84 rear end question
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Yes. Check the link below to an article in the Tech Tips section, it shows the removal steps for swapping to a D44 but removal for gear replacement is identical.
https://www.corvetteforum.com/techti...=218&TopicID=2
https://www.corvetteforum.com/techti...=218&TopicID=2
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Yes. Check the link below to an article in the Tech Tips section, it shows the removal steps for swapping to a D44 but removal for gear replacement is identical.
https://www.corvetteforum.com/techti...=218&TopicID=2
https://www.corvetteforum.com/techti...=218&TopicID=2
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
its probly possible to change the gears with the rear still in the car, but by the time you get the rear cover (batwing) off to access the gears and unhook the driveshaft to remove the pinion gear, there are only two bolts/nuts (c-beam connect) still holding the case in the car...easier to just drop it with the bat still on...imho, the c4 rear is the easiest to remove of any vehicle on the road (a few race cars have been quicker, some not)
you should "spread" the case to remove/install the carrier...i made my own "spreader" from angle iron+bolts and it works almost TOO good, be careful NOT to spread the case more than the SM recommends (o.010" IIRC) as the case spreads with little force and may not "spring back" to normal if spread excessively.
84's all came with d36, both auto and manuel, possible someone has upgraded it already... bolt holding bat to case @ 12:00 is a d36, d44 has no bolt @ 12:00 , other visual clues are numerous but more subtle.
you should "spread" the case to remove/install the carrier...i made my own "spreader" from angle iron+bolts and it works almost TOO good, be careful NOT to spread the case more than the SM recommends (o.010" IIRC) as the case spreads with little force and may not "spring back" to normal if spread excessively.
84's all came with d36, both auto and manuel, possible someone has upgraded it already... bolt holding bat to case @ 12:00 is a d36, d44 has no bolt @ 12:00 , other visual clues are numerous but more subtle.
Last edited by redrose; Jul 20, 2008 at 11:02 AM.
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
d36 is a 7.5" ring gear...d44 has 8.5" ring (much stronger, even vipers don't break their d44's on street tires)...both d36 and d44 came in numerous ratios, only way to be sure what you have is to mark driveshaft and BOTH halfshafts with chalk, etc and turn by hand while counting revolutions, do the math
need to mark "both" halfshafts becuse even tho all c4's have posi, on rare occasions the posi slips and goofs up the count
need to mark "both" halfshafts becuse even tho all c4's have posi, on rare occasions the posi slips and goofs up the count
Last edited by redrose; Jul 20, 2008 at 11:15 AM.
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Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Kind of a shame the Tech Tips section is no longer updated however.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by armyracer11;
he said all 84 vetts had 3.31 gears
The ratio and other pertinent data is likely stamped in to the bottom of the differential carrier housing.
When you count the turns of the drive shaft to determine the gear ratio, there is no "do the math" necessary.
RACE ON!!!
Tech Contributor
Joined: Jun 2004
Posts: 20,934
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
More information than I asked for (I'm familiar with the whole "combo" philosophy). Are you going for lower gearing to help out a lowtorque/peaky motor, or higher gears because the additional torque multiplication isn't needed?