Builds H55/Splitcase into 02/79-40 Series (1 Viewer)

[Poser]

What are your plans for the frame crossmember that will have to be removed? Simply re-locate it rearward a bit, or ??

Hey Alan-


The cross member that attaches to the underside of the transmission was not installed in a 40 series until 08/80, when they went to the 19 spline H41/42 transmission and split transfer case, different spring/shackle hangers, parking brake on the semi-float rear axle assemblies, among other things.

I have a later model cross member assembly that I am going to install in this truck and remove the mounts on the sides of the flywheel housing.



-Steve

 

[Poser]

Hi All:

I'm sorry, "DaveWest5150," but I don't see how that could work!

No disrespect intended, but there is simply not enough room to squeeze in a F Series engine, H55F, and "split" t-case in between the front motor mounts and the mid-chassis crossmember on a FJ40 that came with the H41/42 four speed tranny!

Sure, if it was a B Series engine and H55F and t-case drivetrain it might fit. But, there will definitely be clearance issues with a 2F and a H55f and that mid-chassis crossmember!

Regards,

Alan

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Oh it fits Alan,

Marv has a 1984 40 series that he purchased out of Saudi Arabia that has a 2F, H55 and split case. Apparently it is in incredible condition.



When I installed this transmission in the FJ 60 I did not have to move the cross member that the H42 and split case was mounted to. I just had to shorten the rear shaft and lengthen the front. It is my understanding that the housing of the H55 where the transmission isolator mounts is in the same location as it would be if it were on the H41/42 in relation to the front of the transmission housing.

 

[72cruiser]

yeah, doesn't that come from the fact that the 5th gear is just that extension?

the xmember mount is forward of that location on both the H41/42 and the H55F. i went and looked at the xmember on the later H42 with the spacer that i've got in the backyard...never really put all that together, but it makes sense now, ha ha

malphrus

 

[Cruiserdrew]

It is my understanding that the housing of the H55 where the transmission isolator mounts is in the same location as it would be if it were on the H41/42 in relation to the front of the transmission housing.

Your understanding is 100% correct. The mount bolts in the same holes in the same place on the tranny. The mounts themselves are different, and you'll want an early one, unless you make a custom crossmember. I learned that bit the hard way. If I was doing a custom crossmember, I would use the 85+ mount, since the mounting studs to the cross member are vertical, and not splayed at an angle.

 

[cruiserhead]

Hey Alan-


The cross member that attaches to the underside of the transmission was not installed in a 40 series until 08/80, when they went to the 19 spline H41/42 transmission and split transfer case, different spring/shackle hangers, parking brake on the semi-float rear axle assemblies, among other things.

I have a later model cross member assembly that I am going to install in this truck and remove the mounts on the sides of the flywheel housing.



-Steve

Is that the cross member I sent you last spring?
David

 

[landlord]

Poser,
Could you please give the information for the wheels and tires that are on that truck? That's the look I am aiming for on my rig....I've got a long way to go but a nice looking truck like that sure keeps me motivated to work on mine!

Thanks,
Patrick

 

[Poser]

Is that the cross member I sent you last spring?
David

That is in the pile of parts, along with a few others......

 

[72cruiser]

Poser,
Could you please give the information for the wheels and tires that are on that truck? That's the look I am aiming for on my rig....I've got a long way to go but a nice looking truck like that sure keeps me motivated to work on mine!

Thanks,
Patrick

they look like bfg mud terrains and some jive ol' white wagon spoke wheels...i like that look too on a stocker style rig

 

[Poser]

Poser,
Could you please give the information for the wheels and tires that are on that truck? That's the look I am aiming for on my rig....I've got a long way to go but a nice looking truck like that sure keeps me motivated to work on mine!

Thanks,
Patrick

This is the thread that details the info you are looking for.... <--- this is a link

 

[landlord]

Thanks for the replies and the link!
Regards,
Patrick

 

[Josie'sLandCruiser]

Hi All:

Oh, that is right! Those darn newfangled 1979 and uo FJ40s with all the changes.

I was referring to the mid-chassis crossmember on 1978 and older FJ40s. I always associate that bracket that mounts on the underside of late model H42s as a transmission support, not as a frame crossmember. Also, I associate this part with FJ60s.

Regards,

Alan

--------------------------------------------------------------------------------

Hey Alan-


The cross member that attaches to the underside of the transmission was not installed in a 40 series until 08/80, when they went to the 19 spline H41/42 transmission and split transfer case, different spring/shackle hangers, parking brake on the semi-float rear axle assemblies, among other things.

I have a later model cross member assembly that I am going to install in this truck and remove the mounts on the sides of the flywheel housing.



-Steve

 

[Poser]

So I have been working on this a bit today...


I think that MILLHOUSE figured out what the large mystery piece from the oil pan was...

 

[Poser]

Dropped number five rod bearing, just to see what might be going on inside there...looks pretty good. I will drop a couple more just to make sure there is no lower end drama cooking in here...

 

[Poser]

So the oil pan is down and the clutch has been removed. I have removed the flywheel bolts, and realized that the exhaust system was preventing the flywheel from dropping free. So after gas axing the offending pieces of exhaust tubing out of the way, the flywheel dropped free. It is good to know an exhaust guy.

I also removed the four bolts retaining the number four main cap so that I could remove the rear main seal by hand and inspect the number four main bearing.

 

[Poser]

Removal of the rear main seal...

 

[Poser]

Number four main cap and lower bearing half:

 

[PabloCruise]

Steve,

These pics are gold! I love seeing pics of procedures I have not performed yet...

It always puzzles me when folks on the LCML bash MUD, but then need to link to a photo on some server.

Nice thread!

 

[SD_FJ_40]

Speaking of the H55

Poser,

I'm so glad you are doing this write up. A few weeks ago I started an opinion poll about the H55 and got some great feedback from users.

https://forum.ih8mud.com/showthread.php?t=137751&highlight=H55

Generally the opinion was that it's great for a 55 or 60, but for a 40 most people thought the gains weren't worth the cost.

I'd love to hear your final thoughts (and the owners) after this project is all done.

As for me, the jury is still out, I want to see how much the rubber overdrive helps the highway speed before I make a final judgment.

Thanks again for the post and great pics!

 

[Poser]

So,


Sunday I was going to try and make some real progress on this...


Needed to modify the flywheel housing to work with the input bearing retainer of the H55...



Pictures show the input bearing retainer from the H55 and the areas where the flywheel housing need to be opened up. I marked those two spots with a pink paint pen, and then got after them with a 90 degree die grinder with a carbide tool. It made pretty quick work of the areas that needed to be removed.

 

[Poser]

The top picture shows the tool used to modify the flywheel housing...

The next picture shows the pilot bearing removal tool.