look I want badly to put lower gears in my 80 pu id like to use a set of 4.56 or 4.88 gears out of a newer automatic 4runner or truck w/independent susp even 4.10 out of a manual is better than what i got is this possible are the splines different or do i need different spider gears also will a newer diff bolt into an older housing if any body knows then please help me and let me know Im gettin desparate

 

well if you have a 80 4x4 you have 4.37 gears. 7.5 fronts out of a ifs will not work. if you want to regear i would do like i did. get a newer 5 speed tranny (lower 1-3) and go 4.88 or 5.29s
basically $1000 to regear. for r&p gears, master rebuild kits, lockright and zuk install.

 

"ErikB differentials"

:wabbit2:

 

http://www.brian894x4.com/Gearratiosanddiffs.html

 

what is a ZUK install? just curious

 

my 79 axles have 4.30s in them.
80's should be 4.10s, 81 is 3.90, 82 is back to 4.10..

 

I did some looking and got my hands on hollander and AIM interchange programs rear diffs up to 95 will fit in an 80 front and rear axles so it is possible to run the 4.56 or 4.88 gears out of a newer auto truck or 4runner if any one else is interested in this then please let me know of your by sending me a message or posting a request for info here also supra and newer 2wd 6cyl truck rear diffs will work but they must be rear diffs for both front and rear solid axle trucks if you wish to use newer diffs also if i remember correctly there are 3 different ratios for 80 i will have to check again since its been so long since i put the truck in storage but i believe mine were in the 3.70 or 3.80 range