H072 Drop In 3.90 Wanted

[too blue]

I am looking for a Drop In Third Member for a 3/4 or 1 ton gm rear end. Specifically the 3.90 ratio and a Detroit Locker would be great. These were in many years up to 1972

[jostran68]

good luck i looked for yrs and only found one in 4.10 I have now got a dana 60 in 3.54

[peterdalbymiddl]

chech out this vendor
call the order desk at 1-800-216-1632, talk to a knowledgeable technician.
Considering purchasing parts from drivetrain.com and have questions contact Tech line at 1-702-876-3100 or send e-mail.
Drivetrain Specialists of Las Vegas - Las Vegas NV, 89102


http://drivetrain.com/common/qa.asp?expand=158

Q: My 1960 Chevy longbed stepside 3/4 ton pickup is not capable of highway speeds. I have been told that I need to change the rearend gearing. The rearend is a stock 10 bolt round differential cover and the wheels are 8 lug.


A: If you have a differential with a drop out section you have an H072. For this unit we offer a 3.90 ratio (highest available). Your cost is $285.00 + freight for the ring and pinion kit. We also offer a bearing overhaul kit, your cost is $250.00 + freight. If your differential is a rear cover style it is possibly a Dana 60. If this is the case please provide a bill of material number. Your bill of material number can be found on the passenger side axle tube near the shock mount. The number always starts with a 6 (example being 60305-2). With this number we have a good chance of getting you the correct parts, the first time. To assist you we have provided a sketch at www.drivetrain.com/dana30.html

[Special-K]

3.90s are a tough find,for sure.4.10s are real common.Not much difference in gearing,really.

[chevy67292truck]

it seems theres more 4.10s 4.56 3.73
but a 3.90 that would be sweet to find