Topic: Rear end Diff gears
in Forum: C3 Driveline Components
Next week I`m taking my `69 to Van steel for a Rear suspension and rear end overhaul.
Trailing arms, spindles, bearings.bushings. U joints, pinion seals, the whole nine yards. Already replaced shocks with Koni`s and a 130# composite spring,which was a mistake. Will ask Dan If he`ll change it out for me to 360#spring
I am replacing the dog 3:08 cogs and am leaning towards 3:55 but considering 3: 70`s I have a base 300hp now but will be doing mods Later.
I`m not doing any road racing or drag racing, but I like Acceleration off the line. Long distance driving is minimal but I do take it on the highway. How about sharing your opinions on the gear choices
Thanks
Bob, I have 3:55's in my '79. My engine is pumped up from the L82 original out put, guessing about 225 hp now, with more mods to come. The gears are just ok, not to bad off the line, but leave a lot to be desired in the crusing mode. I would like a little less engine RPM when crusing, gas prices are bad enough. I am only getting about 15-16 on the highway, if I behave which I don't, so the milage suffers. Of course the acceleration is not like havin 4:11's but it's liveable. I am considering a OD trans later in the list of changes.
Dave
good point Dave, I`ll have to consider the OD trans at a later date.
Hank, I think I can run faster than these 3:o8`s get me going. I appreciate the input. Thanks Guys


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Thanks for all your input.
I`ve decided to run with the 3:55`s ,car went in today
I`ll let you know how it turns out next Monday or Tues. when I get it back
Got the car back.Real pleased with the work Van Steel did.
I upgraded the 330# composite for a 360# .Made a big difference.
The 3:55`s are a plus too. I can feel a much improved pull .
Went to a vette show at one of our local chevy dealers over the week end. There were a few c3 for sale
$18- 21 K
In good condition.The value of our cars are definately on the rise.
Some engine mods are next, Time to bring up the Horses a bit.
New intake manifold .some headers and exhaust to start with.
Thanks again to those of you that responded.