This is TikiWiki 1.9.7 -Sirius- © 2002–2006 by the Tiki community Sat 23 of Jan, 2021 [11:11 UTC]

Forum: Hot Heads Tech Talk

Forums->Hot Heads Tech Talk->Rear Axle Gears

ron37
Rear Axle Gears


I have a 37 pickup with 57 Dodge hemi and 5 speed manual. We discussed rear end ratios and figure a 3.55 would be all around best for city and highway over my 3.23. Now a guy says he has a 3.73 sure grip. Does that make a big difference on highway?
  user offline
on: Wed 23 of Dec, 2020 [16:41 UTC] reads: 466

Posted messages

Top
author message
ron37
user offline
Re: Rear Axle Gears
on: Sat 26 of Dec, 2020 [19:41 UTC] score: 0.00
My 37 Plymouth pickup is light weight. The 325 Dodge has a hydraulic roller cam and 10 - 1 pistons. The 5 speed is a NV3500 which is an overdrive. Mine has the gear ratio of 1st - 3.49, 2nd - 2.14, 3rd - 1.38, 4th - 1.0, 5th - .73. Hope that helps in figure out the best gears. I live about 3 miles from the highway. Then it is 4 lane highway to where ever I go. The truck weighs close to about 2800 pounds, so make it 3000 with me in it. I don't want to race. Just have fun and now and then fast take offs. Will run 15" rims with regular wide tires. They will be about 28 to 29 inches tall. I am considering a Dakota, which are the Ford / Mopar 5 lug 4 1/2 from 87 through 1990 then 6 lug, but supposedly the 87 through 90 5 lug axles interchange with the 6 lug axle in the housings.
You just have to use the same size, like 8.25 to 8.25 or 9.25 to 9.25. Also looking at old Mopar car stuff. Also Ford stuff will work. Hope this give you a better idea on what to suggest to work best.

author message
George
user offline
Re: Rear Axle Gears
on: Wed 23 of Dec, 2020 [23:25 UTC] score: 0.00
A lot of late model Mustangs come with 3.55s

author message
Jack
user offline
Re: Rear Axle Gears
on: Wed 23 of Dec, 2020 [17:46 UTC] score: 0.00
Presuming that your 5 speed has an over drive I suggest that either 3:55 or 3:73 would be OK depending on what your driving habits are and weight of the car, tire size etc.
I live out in the country and run a 3:50 gear in a very light car with over drive and 3:91 in my heavy car, also overdrive.
A 3:73 might be a good compromise.
I might add that mine are both 392 Chryslers, and the trannies are the A-833 4 speed manual overdrives. Your 315? might not run as strong.
A higher ratio will put a strain on your light to light driving especially if your pick up weighs very much. 3:23s were to tall for my heavy car.
Fun stuff...


Page: 1/1

Show posts: