Axel Ratio ?
Thread Starter
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Senior User
Joined: Jan 2008
Posts: 373
Likes: 1
From: Hudson Valley, NY
Axel Ratio ?
I working on a '87 F250 4x4 4spd w/302 (still SD, but w/ upgraded cam and LT headers) ..
currently have 3.55 gearing and 32" tires (235/85/16s).. unloaded starts were from second and with the creeper 1st I was happy with the pickup and pull from a start performance of the truck, before the motor upgrades ..
I can get deal on newer axles (from a '93 F-250) that are 4.10 gearing ..
what would I gain/lose performance wise? .. MPG wise?
TIA
currently have 3.55 gearing and 32" tires (235/85/16s).. unloaded starts were from second and with the creeper 1st I was happy with the pickup and pull from a start performance of the truck, before the motor upgrades ..
I can get deal on newer axles (from a '93 F-250) that are 4.10 gearing ..
what would I gain/lose performance wise? .. MPG wise?
TIA
Thread Starter
|
Senior User
Joined: Jan 2008
Posts: 373
Likes: 1
From: Hudson Valley, NY
No OD.. 4sp w/ creeper 1st .. T18 maybe?
with the 3.55 set-up I was happy with the truck, using it for plowing my driveway and the miscellaneous load from the local lumber/supply house ..
.. I'm thinking I'll be towing a pop-up camper, including highway runs with some hilly terrain, when I get this together, but will still need to plow and make those runs to the home center for projects around the house ..
reading around and it seems MPG difference would be minor .. AXLE RATIOS
if I was to consider swapping the trans too, is there some thing better suited? (I don't do automatics
)..
with the 3.55 set-up I was happy with the truck, using it for plowing my driveway and the miscellaneous load from the local lumber/supply house ..
.. I'm thinking I'll be towing a pop-up camper, including highway runs with some hilly terrain, when I get this together, but will still need to plow and make those runs to the home center for projects around the house ..
reading around and it seems MPG difference would be minor .. AXLE RATIOS
if I was to consider swapping the trans too, is there some thing better suited? (I don't do automatics
)..
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Yes... the ZF 5-speed from an F250, you retain granny low and get an overdrive ratio.
