Vette specs book says rear treadwidth is:
84-90 = 60.4"
91-96 = 59.1"
ZR1 = 60.6"
http://dazed.home.bresnan.net/narrowinga9.html
http://www.crankshaftcoalition.com/wiki ... _a_rearend
http://www.bhjproducts.com/bhj_content/ ... ng/dnk.php
http://www.currieenterprises.com/cestor ... px?id=3497
It's not specific on how the measurement is taken, but those numbers look narrow. It also doesn't make sense that it changes when the body style changed because there was no suspension change from 90 to 91.
would probably help if you told us/everyone, exactly where your measuring the length FROM & too,
the outside to outside edge of the disc brake rotors?
the wheel mounting pads,?
the tip of the wheel studs?
wheels on? or OFF?
please give some detailed referance and Ill go put the 1985 vette I have up on a lift and measure it
no that turned out to be slightly more complicated to answer than it at first appeared to be
OK ,I put my 1985 vette up,and measured it,with the car on a lift ,the wheel mount pads are almost exactly 61" wide...
but remember thats with the suspension not under load, hanging lower than it will while driving the car.
.with the car supported on the jackstands under the rotors like it normally sits, the suspension widens a bit as it squats, with the wheels on its going to measure 62-63",wide at the wheel mount pads,depending on load and ride height, if youve got the adapter plates too run the later 93-96 17" wheels on the early suspension youll add 3/4" to each side for the adapter thickness to either length (thats an extra 1.5" to the total length) keep in mind thats to the wheel mount pad, the wheel extends out and in from that dimension depending on the off set of its design, theses more offset to the inside as the rotors on the disc brakes are roughtly centered on the wheel but each wheel design can vary
bits of info you might need
http://www.carnut.com/specs/rear.html
http://www.teufert.net/other/rear end dimensions.htm
http://www.kevinstang.com/Ninecase.htm
http://www.currieenterprises.com/cestore/default_9track9.aspx
http://www.ford-trucks.com/article/idx/9/065/article/Ford_9_Inch_RebuildGear_Setup.html
the FORD 9" has advantages and lots of aftermarket support, but Ive used a DANA 60 rear with its heavier axles and bearings and 9 3/4" gears in all my race cars , they are slightly heavier (about 60 lbs) but basically indestructable compared to the 8 7/8" 12 bolt chevy or 9" fords
http://www.digitalcorvettes.com/forums/showthread.php?t=53882&highlight=dana
http://www.mopar1.us/dana.html
http://ford.off-road.com/ford/article/articleDetail.jsp?id=198404
http://www.ford-trucks.com/article/idx/9/200/article/Dana_60_Rebuild.html
http://www.currieenterprises.com/cestore/dana60.aspx
http://www.dutchmanms.com/pricesheet.html#Anchor-65123
so theres your answer
DANA 36 vs DANA 44
The C-4 Dana 36 was the only axle available in 1984 Corvettes. In 1985, Chevrolet brought out the Dana 44 which was similar to the 80-82 Corvette axle, but not interchangeable. The Dana 44 axle is considerably stronger, but not indestructible. The Dana 36 and the Dana 44 (44's in some autos and all manuals) axles were used through 1996.
The Dana 44 is much larger than the D36. The 44 has a larger, "beefier" carrier/components to handle larger (lower) ring and pinions, and increased torque. NOTICE THE LOCATION OF THE TOP CENTER BOLT HOLE ON THE DANA 36 THATS NOT ON THE DANA 44 REAR, thats a QUICK WAY TO TELL THEM APART
603967 GM 44 REAR 1980 CORVETTE
605172 GM 36 REAR 1984 CORVETTE
605180 GM 36 REAR 1984 CORVETTE
605220 GM 44 REAR 1985-87 CORVETTE
605239 GM 36 REAR 1984-86 CORVETTE
605260 GM 36 REAR 1985-87 CORVETTE
605321 GM 36 REAR 1988-90 CORVETTE
605322 GM 44 REAR 1989 1/2-90 CORVETTE
605365 GM 44 REAR 1988-89 CORVETTE
605417 GM 44 REAR 1990-90 1/2 CORVETTE
605490 GM 36 REAR 1990 1/2-96 1/2 CORVETTE
605491 GM 44 REAR 1990-96 1/2 CORVETTE
605492 GM 44 REAR 1990 1/2 CORVETTE
Look at the size difference, especially at the case above the yokes:
Dana 36
Dana 44
And visit
ikerds.com
Who were kind enough to supply the pics...
viewtopic.php?f=39&t=7
viewtopic.php?f=39&t=1317
84-90 = 60.4"
91-96 = 59.1"
ZR1 = 60.6"
http://dazed.home.bresnan.net/narrowinga9.html
http://www.crankshaftcoalition.com/wiki ... _a_rearend
http://www.bhjproducts.com/bhj_content/ ... ng/dnk.php
Mittler Bros. 1000-RENK1 Mittler Brothers Rear-End Narrowing Tool Kits | Summit Racing
Free Shipping - Mittler Brothers Rear-End Narrowing Tool Kits with qualifying orders of $109. Shop Axle Housing Narrowing and Alignment Tools at Summit Racing.
www.summitracing.com
http://www.currieenterprises.com/cestor ... px?id=3497
It's not specific on how the measurement is taken, but those numbers look narrow. It also doesn't make sense that it changes when the body style changed because there was no suspension change from 90 to 91.
would probably help if you told us/everyone, exactly where your measuring the length FROM & too,
the outside to outside edge of the disc brake rotors?
the wheel mounting pads,?
the tip of the wheel studs?
wheels on? or OFF?
please give some detailed referance and Ill go put the 1985 vette I have up on a lift and measure it
no that turned out to be slightly more complicated to answer than it at first appeared to be
OK ,I put my 1985 vette up,and measured it,with the car on a lift ,the wheel mount pads are almost exactly 61" wide...
but remember thats with the suspension not under load, hanging lower than it will while driving the car.
.with the car supported on the jackstands under the rotors like it normally sits, the suspension widens a bit as it squats, with the wheels on its going to measure 62-63",wide at the wheel mount pads,depending on load and ride height, if youve got the adapter plates too run the later 93-96 17" wheels on the early suspension youll add 3/4" to each side for the adapter thickness to either length (thats an extra 1.5" to the total length) keep in mind thats to the wheel mount pad, the wheel extends out and in from that dimension depending on the off set of its design, theses more offset to the inside as the rotors on the disc brakes are roughtly centered on the wheel but each wheel design can vary
bits of info you might need
http://www.carnut.com/specs/rear.html
http://www.teufert.net/other/rear end dimensions.htm
http://www.kevinstang.com/Ninecase.htm
http://www.currieenterprises.com/cestore/default_9track9.aspx
http://www.ford-trucks.com/article/idx/9/065/article/Ford_9_Inch_RebuildGear_Setup.html
the FORD 9" has advantages and lots of aftermarket support, but Ive used a DANA 60 rear with its heavier axles and bearings and 9 3/4" gears in all my race cars , they are slightly heavier (about 60 lbs) but basically indestructable compared to the 8 7/8" 12 bolt chevy or 9" fords
http://www.digitalcorvettes.com/forums/showthread.php?t=53882&highlight=dana
http://www.mopar1.us/dana.html
http://ford.off-road.com/ford/article/articleDetail.jsp?id=198404
http://www.ford-trucks.com/article/idx/9/200/article/Dana_60_Rebuild.html
http://www.currieenterprises.com/cestore/dana60.aspx
http://www.dutchmanms.com/pricesheet.html#Anchor-65123
so theres your answer
DANA 36 vs DANA 44
The C-4 Dana 36 was the only axle available in 1984 Corvettes. In 1985, Chevrolet brought out the Dana 44 which was similar to the 80-82 Corvette axle, but not interchangeable. The Dana 44 axle is considerably stronger, but not indestructible. The Dana 36 and the Dana 44 (44's in some autos and all manuals) axles were used through 1996.
The Dana 44 is much larger than the D36. The 44 has a larger, "beefier" carrier/components to handle larger (lower) ring and pinions, and increased torque. NOTICE THE LOCATION OF THE TOP CENTER BOLT HOLE ON THE DANA 36 THATS NOT ON THE DANA 44 REAR, thats a QUICK WAY TO TELL THEM APART
603967 GM 44 REAR 1980 CORVETTE
605172 GM 36 REAR 1984 CORVETTE
605180 GM 36 REAR 1984 CORVETTE
605220 GM 44 REAR 1985-87 CORVETTE
605239 GM 36 REAR 1984-86 CORVETTE
605260 GM 36 REAR 1985-87 CORVETTE
605321 GM 36 REAR 1988-90 CORVETTE
605322 GM 44 REAR 1989 1/2-90 CORVETTE
605365 GM 44 REAR 1988-89 CORVETTE
605417 GM 44 REAR 1990-90 1/2 CORVETTE
605490 GM 36 REAR 1990 1/2-96 1/2 CORVETTE
605491 GM 44 REAR 1990-96 1/2 CORVETTE
605492 GM 44 REAR 1990 1/2 CORVETTE
Look at the size difference, especially at the case above the yokes:
Dana 36
Dana 44
And visit
ikerds.com
Who were kind enough to supply the pics...
viewtopic.php?f=39&t=7
viewtopic.php?f=39&t=1317
Last edited by a moderator: