Cummins transmission options

[RBahn]

Hey guys, newbe to tdr. I am doing a 6bt swap into a Fj60 and had a few questions regarding the NV4500 trannny. the engine I have is an '89, what years of the NV4500 will fit this engine? Also is the 2wd version the transmission as the 4wd version with a different tail housing? And finally I was originally planning on going with a AA T-case adapter to retain my stock t-case, drive shafts, and axles. I have heard that the land cruiser axles are pretty tough, and since I don't do any serious rock crawling they should hold up just fine, any opinions from you guys?

Thanks, bahndo

 

[DKarvwnaris]

Hey guys, newbe to tdr. I am doing a 6bt swap into a Fj60 and had a few questions regarding the NV4500 trannny. Pretty heavy motor for the FJ-60 even compared to the OEM Toyota 6 cylinder? How about a 4bt? the engine I have is an '89, what years of the NV4500 will fit this engine?



Any of the NV-4500 trannies will work, you just need to find the bellhousing adapters for a 94 or newer dodge, or else go with the advanced adapters Getrag to NV-4500 bellhousing they put on the market. Also is the 2wd version the transmission as the 4wd version with a different tail housing? Shaft is different as well if I remember. Haven't done many rebuilds on the 2wd boxes to remember. And finally I was originally planning on going with a AA T-case adapter to retain my stock t-case, drive shafts, and axles. I have heard that the land cruiser axles are pretty tough, and since I don't do any serious rock crawling they should hold up just fine, any opinions from you guys?

Thanks, bahndo

I personally have had too many quality issues with Advanced Adapters products. I've done everything from GM small block conversion to landcruisers to getrag to NV-4500 dodge diesels using their catalog parts. NOT IMPRESSED. I have had better luck with a local machinr shop than with their mail order stuff. (their getrag transmission adapter to NV-4500 bellhousing crack, I've r/r'ed 3 of them in otherwise stock trucks, not even bombed engines.

The Land Cruise Axles will take alot of weight, I have subjected them to more abuse than some 9" ford rear ends with no failures. I like the landcruiser axles for the most part. Just need to change that steering assembly with the bell crank connection with a few dozen ball joint ends. The Saginaw steering conversion is the best upgrade you can do for a landcruiser bodied TOY.

 

[WM-300]

Is the cracking in the AA Getrag to NV-4500 due to the weight of the 6B ? In your opinion how will that adapter perform behind a 4B, much less weight ? I have a getrag flywheel housing that I planned ot use with a AA/NV-4500 BH in a future project.



WM-300

 

[Steve Graham]

{Hey guys, newbe to tdr. I am doing a 6bt swap into a Fj60 and had a few questions regarding the NV4500 trannny. the engine I have is an '89, what years of the NV4500 will fit this engine? }



The bolt pattern for the transmission to bell housing is the same for both Dodge and Chevy except for the very early Chevy's with the extra low gear.

The NV44500 bell housing for Dodge's are all the same, 94 through at least 98. 5 and maybe later. The input shaft is about and inch longer on the Dodge and heavy duty version has a 1 1/4 inch dia shaft rather than the 1 1/8 for the regular Dodge and Chevy. All you really need to determine is what transmission adapter you have and buy the bell housing to match.



{Also is the 2wd version the transmission as the 4wd version with a different tail housing?}



Yes the only difference is the tail shaft/output.



{And finally I was originally planning on going with a AA T-case adapter to retain my stock t-case, drive shafts, and axles. }



I've heard of some breakage but with some effort you can break anything.



{I have heard that the land cruiser axles are pretty tough, and since I don't do any serious rock crawling they should hold up just fine, any opinions from you guys?

Thanks, bahndo}



Just watch the weight on the front axle, a dressed out 6BTA is over 1200 lbs.



hope this helps.

Steve

 

[RBahn]

Thanks for the info. I think right now my options are these:1) Buy gas dodge truck with the NV4500, t-case, axles, etc. and do the swap with all the dodge parts. I think I would only have to have some drive shafts made then. 2) Buy a Nv4500, AA t-case adapter and hope for the best. I suppose I can go this route and take it easy until I can find the right axles, t-case, etc, and maybe that will give a chance to save up some money (I am a college student on a limited budget). I guess I'll see what come along first and go from there. .

 

[DKarvwnaris]

Thanks for the info. I think right now my options are these:1) Buy gas dodge truck with the NV4500, t-case, axles, etc. and do the swap with all the dodge parts. I think I would only have to have some drive shafts made then. 2) Buy a Nv4500, AA t-case adapter and hope for the best. I suppose I can go this route and take it easy until I can find the right axles, t-case, etc, and maybe that will give a chance to save up some money (I am a college student on a limited budget). I guess I'll see what come along first and go from there. .

If you look do a search online for Novak adapters, you may be happier with their products than A/A. I have not used their prodcuts yet, but a good friend of mine with a Rock Crawler Jeep loves them. The adapters for the transmission/ Transfer case are shorter and appear to be made of thicker materials. Check them out.



The biggest thing I don't like about A/A's getrag bellhousing is when it crackes, you are stuck ordering another from A/A. If you go with off the shelf Dodge parts, you can find parts locally in a day or so, not to mention the casting design is superior. (cheaper too) Alot of A/A products look like the Chinese casting quality of recent years. (I was told they have a lot sub contracted out overseas, but no one has verified this yet)



I'd look towards a 4 bt for more reasons than the weight, it is cheaper to rebuid, will get you higher fuel economy compared to even a 6bt at factory fuel settings, and is much easier to fit into the engine bay length wise.