internal differances between H55 and H55f

[In2cruisers]

I purchased a BJ-60 with a bad H55 for FJ to BJ transplant. I have a good H55f in the garage. I know the output shafts are different, but how about the internals?

Thx

[roscoFJ73]

The proper name for that gearbox is the H55f regardles of the spline count.
As far as I know there is no H55.
Everything inside is the same.

[crushers]

everythign is the same between the different H55(F) trannies except the imput shafts for the different applications...

[rick_d]

uh urgent correction.

there are two different H55's, the early open input bearing used to approx 1985-including all bj42's, some bj60's and some bj70's in canada.

the later, often using a sealed orange (or black aftermarket) input bearing. the input shafts DO NOT INTERCHANGE, nor do the bearings.

pull the figure 8 bearing retainer (front of transmission) and look at the bearings side by side.

the late versions are the same internals from 1985+ to 1999- there are bj, hz, 2h& gas inputs that interchange to these models.

it's a nightmare to stick a 1983 3B input into a 1989 2H transmission.

[Tapage]

Originally Posted by rick_d

it's a nightmare to stick a 1983 3B input into a 1989 2H transmission.

why .. ?

I thought aren't the same H55F for my 2H and for HZ engines .. diferent input shaft again I thought ..

[rick_d]

I have to rethink the process, but the early bearings are 90mm diameter, the later are 92mm. depth to c-clip is also different. A later input could be used with an early bearing and case, but the input would have to be machnined for the c-clip or possibly use a different locking system (twin clips?).

I had this issue with a new input/bearing I supplied to a guy with early transmission in Flagstaff, AZ 4 years ago.

machining the case to accept the later bearing is near impossible.

...they don't cross

[bigbrowndog]

Originally Posted by Tapage

why .. ?

I thought aren't the same H55F for my 2H and for HZ engines .. diferent input shaft again I thought ..

Correct , My old 2h shaft on the left with the coarse spline,and a new 1HZ shaft on the right with fine spline also its a bit longer.

[Jan-78FJ40]

I'd need some clarification on this as well.
My 84HJ60 (from central america) had a H55(F?), in bad shape. I purchased a new H55F for a gasser 2F, and stuck it in.
did I do something really stupid? It bolted up (with a later HJ60 bell housing)-at least I think it bolted up, and it is running fine (again-I think it is running fine).

anyone? or what am I misunderstanding?

thanks
J

[rick_d]

as stated in question these are INTERNAL differences between H55's.

oct 1982-oct 1985 5 speed cast iron transmissions for heavy duty land cruisers (that folks would be a H55, they are all "H55F"'s) uses a front input shaft bearing
# 90365-40002

oct 1985-sept 1999 uses
# 90363-40035 (subs up in some models to 90363-40037 BUT reverts back to 40035 to end of production of H55)

dimensionally these two front bearings are different, therefore the machining in the cast iron case and on the input shaft itself are different dependant on date of production. there is a hard cut off to ease of fit in october 1985 production truck transmissions.

spline lengths are irrelevant, we are talking "pre" and "post" oct 1985
----------------------------------------------------------------------
comments...
an april 1985 canadian spec BJ70 input shaft will not willingly fit a common 33030-60450 or -60431 H55 sold new in the US and Canada as of this date, August 21, 2006.

If you had a 1984 australian HJ47 troop carrier, you cannot take the input shaft of that transmission and place it into a -60450 or 60431 transmission.

A 1987 Canadian spec BJ70 H55 CAN donate it's input shaft to a -60450 or -60431 north american market new H55 for conversion.

ENS price on a "1995" HZJ75 H55 transmission is $6,500 cdn. The HZ input shaft in US dollars is $300. The -60450 H55 is $1,550-$1,800 USd. You can take the input shaft out of a -60450 transmission and replace with HZJ input and make the same transmission as the $6,500 cdn unit from ENS.


sources:
1981-1987 world J60 parts manual
1988-1992 world J62 parts manual
1984-1990 world J70 parts manual
1990-2004 world J70 parts manual

[PVCruiser]

Originally Posted by rick_d

uh urgent correction.

the later, often using a sealed orange (or black aftermarket) input bearing. the input shafts DO NOT INTERCHANGE, nor do the bearings.

pull the figure 8 bearing retainer (front of transmission) and look at the bearings side by side.

Yeah Rick's correct. I bought the wrong rebuilt kit by accident once. Had the larger sealed bearing and I needed the smaller bearing. Everything else in the kit worked, just set me back another $35 for the correct bearing at NAPA.

[Tapage]

Originally Posted by bigbrowndog

Correct , My old 2h shaft on the left with the coarse spline,and a new 1HZ shaft on the right with fine spline also its a bit longer.

I thought both come from H55F tranny ..one for 2H and other ( right ) for HZ engine.

So buy an H55F for HZ input shaft and swap it into 2H H55F is posible with right bearing . ?

[rick_d]

no, bearing alone won't make them work.

late transmissions will take HZ input shaft, early transmission cannot


(without machine work and then still a ???)


october 1985 is cut off date.

[bigbrowndog]

!HZ and 2H bell housings.

[bigbrowndog]

Originally Posted by rick_d

no, bearing alone won't make them work.

late transmissions will take HZ input shaft, early transmission cannot


(without machine work and then still a ???)


october 1985 is cut off date.

It is my understanding that the later Toyota stock gears are identified by a v shaped nick in them and that they should not be used in an early model box.