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FJ40 Rear Diff FFloat...size?????please help!!!!!!!!!!!!!!!!

Tech Talk for Cruiser owners.

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Posts: 36
Joined: Mon Sep 06, 2004 10:43 pm
Location: fremantle west oz

FJ40 Rear Diff FFloat...size?????please help!!!!!!!!!!!!!!!!

Post by bumpy »

Need some help on working out the exact size of my rear diff as I'm getting a locker from the states.

fj40 full floating..has 10 bolts on the housing. 30 spline.

I can;t check the ID plate as its not the original diff...

Have been told its 8.8" but just want to verify...

websites I have seen say the 30 spline 8.875 has 12bolts on housing(US sites). and as mine has 10 bolts I'm confused :? and some say its an 8"...

I have searched the site but bring up everything but what I need...I have also searched google and this is where the confusion increases :?

So would love some help from a toyota diff guru.... :D so I don;t waste my money....

Thanks in advance....brendon
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Post by ZOOK60 »

correct me if im rong but i think 8" is lux stuff and 60s and 40s is 9.1/4"
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Post by dumbdunce »

a picture will help. what locker are you buying?
Free air locker to the first 20 callers!
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Post by bumpy »

I'm getting a powertrax no-slip

Dont see how a photo will help as its a standard 40 series full floating diff...

thanks...brendon
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Post by 80UTE »

Cruiser's have 10 bolts that secure the diff centre assembly into the axle housing and i think they 12 bolts that secure the carrier to the crownwheel. If the locker is a 30 spline to suit a cruiser it will fit and cruiser diff front of rear from 1970 to 1990 and the rear of any cruiser fron 1990 to 1998. Thats FJ40-45-47-55-60-62-70-75, BJ42-43-73, HJ45-47-60-75 front and rear diffs. Also the rear of FJ75 (1989+)-80, HZJ75-80 and HDJ80.

Wally
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Post by bumpy »

Thanks for clearing that up Wally....

Cheers mate, Brendon
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