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FJ 73 diffs

Posted: Wed Aug 31, 2011 1:54 pm
by toybrad
Hi can anyone tell me are the diffs in a 75 the same as a 73 middy? :? Thanks for any help on this.

Re: FJ 73 diffs

Posted: Wed Aug 31, 2011 2:01 pm
by hulsty
what years are both vehicles?

Re: FJ 73 diffs

Posted: Wed Aug 31, 2011 7:15 pm
by Ice
in short yes

you havent said Z in the model designation so nothing should have a high pinion in it

Re: FJ 73 diffs

Posted: Thu Sep 01, 2011 6:42 am
by toybrad
i have a 3rd mouth 87. i has just tring to getan idear on parts. its hard to find middy parts at a deacent price.
Thank for the feedback.

Re: FJ 73 diffs

Posted: Thu Sep 01, 2011 7:29 pm
by RED60
If you are going to do a swap, just make sure you get the same ratio in front and back..... there is a common ratio of 4.11:1 and an uncommon one 3.7:1... but they will both fit.... :cool: :cool:

Re: FJ 73 diffs

Posted: Thu Sep 01, 2011 8:52 pm
by ndog
yer but the later 75s have the smaller high pinion like the 80 series, i have a few parts and diffs laying around from my old bj73, cv , spindals new discs ect.

Re: FJ 73 diffs

Posted: Fri Sep 02, 2011 10:44 am
by evanstaniland
I thought all 75s ha the bug diffs it was the 78, 79, 70(new ones) series that had the smaller front!

Evan

Re: FJ 73 diffs

Posted: Fri Sep 02, 2011 1:05 pm
by hulsty
evanstaniland wrote:I thought all 75s ha the bug diffs it was the 78, 79, 70(new ones) series that had the smaller front!

Evan
Nopre, change was in 1990/91 when the 1HZ went in.

Re: FJ 73 diffs

Posted: Fri Sep 02, 2011 2:13 pm
by GO79
If you find two back diffs from 75s you can put one in the front of you middy

Re: FJ 73 diffs

Posted: Fri Sep 09, 2011 2:41 pm
by keencdk
Also front and rear centres from 40 series and 60 series will fit fine. Note that with the 40 series most are fine spline 4.11 but some are 3.7 ratio and some may be course spline