Rear end question.....again
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Rear end question.....again
Sorry, I know we've been here before...
P225/70R15...27.4 inch diameter?
At 60 MPH I'm seeing 2500 RPM in 3rd gear (auto)...the programs I can find on the internet are showing I have a 3.40 rear end...is that right?
P225/70R15...27.4 inch diameter?
At 60 MPH I'm seeing 2500 RPM in 3rd gear (auto)...the programs I can find on the internet are showing I have a 3.40 rear end...is that right?
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by SmokedTires
That's what I find using an online calculator 
Thread Starter
Burning Brakes
Joined: Aug 2005
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by chevylit
In 76 the following were offered: code OA-3:08, code OD and LR-3:36
code OB-3:55 and codeOC-3:70.
code OB-3:55 and codeOC-3:70.
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Yeah, that's what I'm thinking...once it warms up around here again, I'll be back under the car and I'll check the stamp, but it looks like from what you told me, being the 3:36's came in two different styles, it was probably what they put in most of the vettes back then, just a stock, standard rear end, for those that didn't care what was back there, just as long as they could buy a vette...
Very good...you've been very helpful, chevylit...thanks much!!
Bill
Very good...you've been very helpful, chevylit...thanks much!!
Bill
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by chevylit
In 76 the following were offered: code OA-3:08, code OD and LR-3:36
code OB-3:55 and codeOC-3:70.
code OB-3:55 and codeOC-3:70.
Thanks...
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Burning Brakes
Joined: Nov 2003
Posts: 990
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From: North Texas
You should also note that the actual tire height does not always match the calculation.
I have a set of 275/60/17 which should calculate to be 31" but when on the vehicle, the measured roll-out is only 30.25"
I have a set of 275/60/17 which should calculate to be 31" but when on the vehicle, the measured roll-out is only 30.25"
Racer
Joined: Dec 2004
Posts: 379
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From: Fairfield Texas
Originally Posted by kb2fzq
Chevylit?...one more question...do you know if which, OD 3:36 or LR 3:36, represents a posi rear end and do you know if the "stamp" on the rear end will show that information (OD or LR)??
Thanks...
Thanks...
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
chevylit: Would you happen to have the axle codes for '71 handy?
Originally Posted by chevylit
In 76 the following were offered: code OA-3:08, code OD and LR-3:36
code OB-3:55 and codeOC-3:70.
code OB-3:55 and codeOC-3:70.
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by chevylit
In 76 the following were offered: code OA-3:08, code OD and LR-3:36
code OB-3:55 and codeOC-3:70.
code OB-3:55 and codeOC-3:70.
Just went out and measured the radius X 2= it's just a little over 27, like 27.1 inches...dropped it into the calc'r...came in at 3:36 right on the nose!!
COOL!!