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9/28/11 9:39pm - Original Message: 'Keisler 5 speed Driveshafts'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Just a word of advise to anyone out there that has installed a Keisler 5 speed conversion to their vette or any car. If your car has an annoying vibration chances are the driveshaft they provide isn't up to snuff.

I put my Keisler Tremec 5 speed in back in '09.

Since then I have been chasing a high speed vibration for quite awhile which has been getting worse. I figured it maybe a u joint or tire balance issue or possibly a wheel bearing. So, after road force balancing my new tires, replacing all the u joints, replacing the rear wheel bearings, servicing the front wheel bearings. I decided to put my car on the lift and let it idle in first gear to get a look at things underneath. Lo and behold the driveshaft was wobbling like crazy. So I talked to a tech at Keisler and after a long conversation I decided to just forget trying to do anything with them because I know its going to cost me unnecessary money in the long run.

Thank God I have Denny's Driveshaft nearby. I had him built me a driveshaft to replace this one. The Keisler supplied slip yolk was so far away from being in the centerline of the u joint there was no way Denny could even balance the shaft. Denny's machine will spin a shaft up to 10,000 rpm's vs. Keislers 2500 rpm machine.

So I figured I'd share this info since I went through a few suggestions to a couple blank deer in the headlight looks and figured it out on my own.



BTW, this is post 1500 for me! Yeah! It only took 10 years to do it. I'm sure there are a couple out there that prefer I don't talk that much. lol.


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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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9/28/11 10:21pm - Reply: 'Re: Keisler 5 speed Driveshafts'
rick jay Gold Member
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Liverpool, NY - USA

Vette(s):
72 coupe, 350 4 spd, modified motor, exhaust, tires & wheels. '91 ZR1, modified exhaust.

Joined: 1/21/2003
Posts: 82
Thanks for the headsup Sarge.  I have a Tremac 5 speed still in the box in my garage waiting to be installed.  I'll be sure to have the driveshaft checked for balance before it goes in.  That's too bad you couldn't get any satisfaction from the supplier.  Not very good business ethics.
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9/28/11 10:32pm - Reply: 'Re: Keisler 5 speed Driveshafts'
Jaws79 Lifetime Member
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Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

Joined: 4/27/2008
Posts: 4211
Glad you got it straightened out, Sarge! Gonna make cruising a whole lot more fun!
 
Barry
 
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9/29/11 8:18pm - Reply: 'Re: Keisler 5 speed Driveshafts'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Roger that Sarge!! Pole vaulting with a drive shaft ain't no fun!! Had mine shortened and high speed balanced when I did the 700R4 - smoooooth!!!

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9/29/11 9:14pm - Reply: 'Re: Keisler 5 speed Driveshafts'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Denny's finished up my driveshaft today. This thing was like a work of art. But no matter how careful I was I managed to put a couple small scratches on it. Disapprove

Since I forgot to tell them that I needed a "quick disconnect" slip yoke they gave me the regular slip yoke. Oops, my bad. No big deal though. I just marked all the pieces and disassembled the slip yoke. (As recommended by Denny) I put the slip yoke in the tranny, then finagled the driveshaft in. Then put the bearing caps and clips in place and "wa la" problem solved. I turned the driveshaft quite a few revolutions and no more wobble. Yeah! So this weekend I hope to have the console all put back together so I can give it a good test run. Then I'll let ya'll know how it goes.

@rick jay, Of course as luck would have it. It was long out of warranty. Keisler was considering a good will gesture. But! They wanted a shop to to check the balance of their driveshaft. Well, that's $90 here. Then I would be looking at shipping cost $30-$50. Then run into the possibility of getting another untrue driveshaft. I wasn't willing to take the chance. I've tried something like this before and it wound up being a complete waste of time and money.

@Paul, I agree. Pole vaulting a shaft would make for a bad ride. lol. Speaking of shortening a driveshaft. The Keisler driveshaft was actually to long. Even with the "quick disconnect" slip yoke it was a real PITA to remove from the car.

One last note. The transmission mount that was supplied with the 5 spd. kit was collapsed and there was metal to metal contact. I replaced it with a good polyurethane mount from Energy Suspension.

Don't get me wrong here. I'm not dogging out Keisler. I'm pointing out potential flaws in their kits. Hopefully this may help someone avert a problem if they have one of these kits.




____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


Lifetime Member #26
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9/30/11 10:05pm - Reply: 'Re: Keisler 5 speed Driveshafts'
stingrayjim jr Lifetime Member
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SHELBYVILLE, TN - USA

Vette(s):
1976 L48 auto

1978 L82 4speed

1994 LT1 6speed

Joined: 7/5/2002
Posts: 3934
Good news Daryll, glad you found the source of the vibration. Guess i might need to look into my drive shaft on my 78, as it is a Kiesler shaft too....  and i've always had a bit of vibration as well, nothing overly concerning, but my gear shifter always had a bit of shimmy shimmy shake to it... always thought i might be related to cutting the crossmember and not getting it back in "exactly true".... Thanks for the 'heads up' :)

jimmy...


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StingrayJim
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10/2/11 10:25am - Reply: 'Re: Keisler 5 speed Driveshafts'
corvette440hp Lifetime Member
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Joined: 7/2/2006
Posts: 8205
Sarge, very good info. I recently had a drive shaft made by a local company. I wanted a high speed balance at least 7,000 rpm's. They told me that they only go with 2,500. My car is still apart (chassis all complete body not on yet). 

|UPDATED|10/2/2011 7:25:10 AM (AZT)|/UPDATED|


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corvette440hp
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10/1/11 6:34pm - Reply: 'Re: Keisler 5 speed Driveshafts'
rick jay Gold Member
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Liverpool, NY - USA

Vette(s):
72 coupe, 350 4 spd, modified motor, exhaust, tires & wheels. '91 ZR1, modified exhaust.

Joined: 1/21/2003
Posts: 82
    Even though I check and dbl. check all my re-assembly projects, I know I wouldn't have checked the driveshaft because of it being brand new and trusting it to be balanced. Thanks again for the info, Sarge.  It sure will come in handy.  And I have to agree with you on handling it the way you did.
    Two years ago at just under 15k miles on my '91 ZR1, I found that I had a couple of misfiring ignition coils.  I replaced 'em with Accels' because of their long history and I've used Accel in many applications in the past.  I trusted them.  Less than 2k miles later, I'm having the same problem.  Long story short, instead of dealing with sending the coils back so they could be examined and determined as to what they found, rather than let my car sit all summer waiting for an answer, I bought a different set of ignition coils.  After about 3.5k miles, the car still is running good.  No, it's running great.  I need suppliers and products that I can trust in.  I use to trust Accel but not any more.  And I go out of my way to support "Made in USA".  The new coils I installed are that.
 
Thanks again, Sarge
Rick J
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10/1/11 6:37pm - Reply: 'Re: Keisler 5 speed Driveshafts'
rick jay Gold Member
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Liverpool, NY - USA

Vette(s):
72 coupe, 350 4 spd, modified motor, exhaust, tires & wheels. '91 ZR1, modified exhaust.

Joined: 1/21/2003
Posts: 82
Hey, Corvette440, awesome looking chassis and drivetrain.  WOW!  You can eat off it.
 
Rick J
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10/1/11 11:19pm - Reply: 'Re: Keisler 5 speed Driveshafts'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
^^^^ I agree. That chassis is awesome! Show car material there. Approve

@Rick Jay, I'll see you at Watkins Glen this coming weekend. Thumbs Up

I'm glad I could offer some info regarding a potential problem.

I don't post here much. Actually I haven't posted much tech/help stuff here in quite a few years.
Once some of the "heavy hitter's" joined, I pretty much relegated myself to PM's, personal phone call for technical chat and lurking status. They made me feel like my knowledge level was inferior to theirs. Ouch Even though I have spent most of my life working on cars, heavy equipment, aircraft. And no I don't know everything. Oops, Sorry. I'm off topic. My bad. Gotta go! Clown


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


Lifetime Member #26
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10/2/11 10:23am - Reply: 'Re: Keisler 5 speed Driveshafts'
corvette440hp Lifetime Member
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Joined: 7/2/2006
Posts: 8205
Sarge81 said: ^^^^ I agree. That chassis is awesome! Show car material there. Approve

@Rick Jay, I'll see you at Watkins Glen this coming weekend. Thumbs Up

I'm glad I could offer some info regarding a potential problem.

I don't post here much. Actually I haven't posted much tech/help stuff here in quite a few years.
Once some of the "heavy hitter's" joined, I pretty much relegated myself to PM's, personal phone call for technical chat and lurking status. They made me feel like my knowledge level was inferior to theirs. Ouch Even though I have spent most of my life working on cars, heavy equipment, aircraft. And no I don't know everything. Oops, Sorry. I'm off topic. My bad. Gotta go! Clown


Sarge, I'm glad that you posted about the driveshaft. It was very useful information. I did increase my driveshaft size for more strength. I aso went with a forged yoke that's beefed up to use a Spicer 1350 U-joint. My shop made the driveshaft to the identical end to end dimensions. When I went to install it I had to pull the engine back out to get everthing to fit. Once I got everything installed, I didn't have any slip movement do to the increased size and overall beefed up design. Needless to say, I had to pull everything apart and have the shaft resized to allow for some slip clearence. I don't want to be pulling the engine to get the driveshaft out........not cool. I only wish that the rpm spin balance was higher. Thanks for the great post, Larry   

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corvette440hp
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10/2/11 10:38am - Reply: 'Re: Keisler 5 speed Driveshafts'
corvette440hp Lifetime Member
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Joined: 7/2/2006
Posts: 8205
Sarge and Rick, Thanks for the nice compliments on my chassis. I appreciate it. Lots of time and money spent. I deleted the picture........it was probably "OFF TOPIC"Wink Sorry about that!

|UPDATED|10/2/2011 7:38:53 AM (AZT)|/UPDATED|


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corvette440hp
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10/7/11 10:40am - Reply: 'Re: Keisler 5 speed Driveshafts'
chucks7d8 Lifetime Member
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WARNER ROBINS, GA - USA

Vette(s):
1978 Base model, White w/red int. L-48, 4-speed, wide ratio. Has 82 CE wheels. New HEI & LT1 Headers now. UPDATE, NEW Tremic 5-SPEED installed. 2007 C6 Yellow Conv. Loaded except no Z-06 BOO HOO

Joined: 2/16/2003
Posts: 220
   Thanks Darryl for the info, I'm installing one right now.
I pulled my engine last week to get the Tranny in so I'm doing a little updating at this time before I reinstall everything. I was upset with Keisler for not informing me that the engine WOULD have to be pulled to get the tranny in on cars with the welded in cross member, now the possibility of a Drive Shaft problem on top of that, what's next??       I love these cars!!!


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10/7/11 10:09pm - Reply: 'Re: Keisler 5 speed Driveshafts'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
Hey Chuck, sorry to hear that you are having to go through the extra work to get it installed. I was lucky to have a bolted in cross member.  I was talking with Dick "VetteCountry" today about how his cross member was welded in. He cut his cross member and did a little fabricating so he can remove it easy enough to allow for the trans to come out like normal. You might want to talk to him and get some ideas to maybe do something like that. Just a suggestion.

You'll know if your driveshaft isn't right. Trust me. Also do yourself a favor, and throw that cheap rubber trans mount that was supplied with the kit in the garbage and put in a good polyurethane mount. My rubber mount was collapsed to the point that there was metal to metal contact between the mount and the cross member.

I can honestly say that my car is now smooth and vibration free. On my way to Watkins Glen this morning (for the Northeast gathering) I took my car on a nice open stretch of highway and buried the speedo. It was like night and day. It's actually a joy to drive my vette again.

The last drivetrain issue I have is the differential. It's a little noisy. Somethings not right back there. I'm not sure if the bad driveshaft caused damage to it from all the vibration or if the shop that rebuilt it didn't do a good job. I guess it doesn't really matter. But I have to address that issue over the winter.

Take care! Sarge


____________________________________

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


Lifetime Member #26
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