|
Register or Log In To remove these advertisements. |
|
|
|
|||||||
| View Poll Results: best low budget option to lower mpg and still tow a car trailer, '79 dually 454 th400 | |||
| leave it as is, drive slow, pay the price for gas, and enjoy 1979 stock |
   
|
3 | 23.08% |
| swap rear diff gears from 4.56 to 4.10 |
  
|
2 | 15.38% |
| swap rear diff gears from 4.56 to 3.73 |
  
|
1 | 7.69% |
| swap trans or get gear vendors and it'll pay off in several years |
  
|
3 | 23.08% |
| other |
  
|
4 | 30.77% |
| Multiple Choice Poll. Voters: 13. You may not vote on this poll | |||
|
|
Thread Tools | Display Modes |
12-31-2021, 10:33 AM
|
#6 |
|
Registered User
Join Date: Jan 2017
Location: Easton PA
Posts: 222
|
Re: C30 dually rear diff gearing options help please
With a 454 I'd be tempted to go 3.73 but I dont have any real world experience with that combo. 4.56 is really low and pretty popular with the 4x4 crowd you might be able to trade gear sets for nearly free.
Using the gearing calculator at http://www.grimmjeeper.com/gears.html it looks like 3.73's would drop almost 600 rpm's at 70mph compared to 4.56's. |
|
|
| Bookmarks |
| Tags |
| 4.56, 454, c30, dually, mpg |
| Thread Tools | |
| Display Modes | |
|
|
Threaded Mode