WHAT YEAR DID TOYOTA CHANGE FROM A COURSE SPLINE PINION TO A FINE SPLINE PINION ? WAS IT 78 ? (THAT SEEMS TO BE THE YEAR THEY GOT THERE CRAP TOGETHER)

I think it was 79

The very early 78's has course spline pinions and 4.11 gears and the rest of that year had fine spline 4.11's.

The '78 model year was the longest run of any FJ-40 model as they went into 79 since that was the year they redesigned the FJ-40.

In '79 the 3rd members went to 3.70 and stayed that way in all US models until the FJ-62.

Originally posted by yoda
I think it was 79

Actually 78 was the first year for the fine splined, only year for 4.11 FJ40's
79-87 was fine 3.73
88-what ever the last year of the FJ80 was 4.11
So good donors are all the FJ62's ,1978 40's & 55's and the rears of the 80's
BTW the 78's are the only year using the smaller, old style flange the others will require die grinding or re drilling to the smaller pattern
Butch

I have pulled apart two 1978 FJ40 diffs. The 12/77 had course spline pinion shafts, and the 3/78 had fine spline. I "think" I remember reading that the midyear change to fine splines in 78 occurred in 1/78. But don't quote me.

Thanks for the info guys:beer: . I was just wondering about that because I just got done doing a ratio change for a friend 78 fj40 , and his had course in the rear and fine in front. And the new gear sets were fine...

yeah fish you where right :fj: :grinpimp: :skull:

Hey Fish,

You should tell your friend to put the fine spline in the rear and coarse in the front.

CK

Originally posted by fj40charles
Hey Fish,

You should tell your friend to put the fine spline in the rear and coarse in the front.

CK WHEN I GOT THE 4.88 FROM PRECISION GEAR THEY WERE FINE SPLINE... BUT I THINK I AM GOING TO USE YOUR IDEA ON MY CRUISER , MAYBE I WONT SNAP PINION SHAFTS SO EASY:mad:

:flipoff2: fish what is up dawgggggggggggggggg

hey fish what did you ever do with the pinions?did you swtich them?

BJ40's had 4.11 I have a '79. Yeah Yeah, non USA:flipoff2:

Originally posted by cruzila
BJ40's had 4.11 I have a '79. Yeah Yeah, non USA:flipoff2: DUDE, i think your in the wrong thread :clown: we were talking pinion splines not ratios:flipoff2:

yeah you go fish tell them :flipoff2: fawker. you still going to livingston on the 12th? i will bring the
:beer:

Originally posted by fish
DUDE, i think your in the wrong thread we were talking pinion splines not ratios :flipoff2:

Duuude :flipoff2: I am in the right thread. The 4:11 "fine spline" pinions were carried beyond 1978 FJ40's I have a 79 with fine SPLINE 4:11;)

from: wngrog........The very early 78's has course spline pinions and 4.11 gears and the rest of that year had fine spline 4.11's.
The '78 model year was the longest run of any FJ-40 model as they went into 79 since that was the year they redesigned the FJ-40.
In '79 the 3rd members went to 3.70 and stayed that way in all US models until the FJ-62.

Originally posted by cruzila
BJ40's had 4.11 I have a '79. Yeah Yeah, non USA:flipoff2: OK where the hell do you say any thing in this first post about pinion splines?:flipoff2: Sounds to me like all your doing is braggen about your BJ40 , ( i would too:D )
:eek: FINE SPLINES WERE CARRIED BEYOND 78 :rolleyes: Yes I know they were carried beyond 78 my question was when did toyota start useing the fine splines..:flipoff2: :flipoff2:

Sorry I was ass u mee ing we all knew that after 79 fine splines were used. It was answered in previous posts.

Yes i Was bragging:rolleyes:

It was my misunderstanding for some time that fine sp 4:11 were specific to mid/late 78 only and thus very rare. i now know much different. Like aftermarket 4:11 are fine spline.

To ask another ? anyone seen any or many Fine spline pinions break??

Originally posted by cruzila
Sorry I was ass u mee ing we all knew that after 79 fine splines were used. It was answered in previous posts.

Yes i Was bragging:rolleyes:

It was my misunderstanding for some time that fine sp 4:11 were specific to mid/late 78 only and thus very rare. i now know much different. Like aftermarket 4:11 are fine spline.

To ask another ? anyone seen any or many Fine spline pinions break?? :D I have not seen any fine splines break, but on the other hand I have broke plenty of course splined pinions:mad:. That really sucks when that happens, that makes for a long day trying to get back to camp.....

fish bring me the tpi catolg fawker:eek:

Sure I have seen fine spline pinions break! If you have a good anti-wrap bar you will seriously limit the breakage, but the pinion is still small.....