Re: [AMC-List] 79 CJ7 Transmission ID ??

[msproviero@xxxxxxxxxxx]

A lot of factory parts?  How do you figure that?  Doesn't the CJ T-18 use the same crossmember and already has the correct input shaft?  The only things that pop into my head that you'd probably have to chase down are driveshafts and maybe the trans tunnel cover.  Are you thinking of a T-18 from a full-size Jeep?  In that case I would agree with you due to the long input shaft.

BTW, since I wrote that last reply someone finally sent me a VIN from their CJ that appears to denote a factory 304/T18 combo.  I'd be more inclined to believe it if they sent a picture, though.  Its not like its hard to figure out what the V8 VIN should be...

As for the np540, its probably a good setup based on the gear ratios and its about 40lbs ligther than the Clarks, but I still don't think many Jeepers are going to go running after a manual trans that weighs 160lbs by itself.  I can see it as more justifiable in a full-size Jeep, but if you're going to have the extra length on hand anyway, I think most people that have the real estate in their rig may opt for more modern, synchronized hardware with a bigger aftermarket like the NV4500.  The other issue is transfer case compatibility.  Unless you're running a divorced transfer case, this could be a bigger headache than mating it to the engine.  A 7:1 first gear is great, but not if you're stuck with a NP205 or some other 2:1 transfer case.  The T-18's 6.32 + a factory NP 2.62 or 2.72:1 transfer case still beats it.  And if you're building your rig for low-gear action, do you really intend for it to see enough highway that you need an OD?  YMMV...

I'm running 1-ton gear under my CJ-8 and the current drivetrain is a wide T-18 mated to a 1980 Scout Dana 300.  The wide T-19 would be nice, but I might consider one of the big 5-speeds if there was a decent transfercase to be used.  Its already going to be heavy with the V8 and D60/D70 + armor, winch, etc.  I'll just leave the little lady at home and then the trans would only "weigh" 50lbs.  Lol...


-Spro

-------------- Original message -------------- 
From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker) 

> the t-18 is a lot longer than the t150 so it takes a lot of factory 
> parts to make the swap. advance adapters has a custom mainshaft and 
> t/c adapter for np435 4sp that makes the ford version a direct swap 
> for the t150. 

> an intriguing digression i've never heard fully decided either way is 
> that afaik the np435 is essentially a 4sp version of the 5sp np540 
> with a spacer where 2nd would be, thus explaining the bizarre shift 
> pattern. this raises the question of whether the aa mainshaft would 
> also work in a np540... i did discover that 540s were made with lots 
> of gear combos, and the one jeepers would want is a np540fl from a 
> ford f500. they were used late '60s to early '80s at least, with 300 
> sixes and 360 v8s, and have the widest ratios: 7+:1 granny 1st, ~4:1 
> synchro 2nd... 
> ________________________________________________________________________ 
> Andrew Hay the genius nature 
> internet rambler is to see what all have seen 
> adh@xxxxxxxxxxxxxxxxx and think what none thought 
> _______________________________________________ 
> AMC-List mailing list 
> AMC-List@xxxxxxxxxxxx 
> http://www.amc-list.com/mailman/listinfo/amc-list 
> 
> or go to http://www.amc-list.com 
_______________________________________________
AMC-List mailing list
AMC-List@xxxxxxxxxxxx
http://www.amc-list.com/mailman/listinfo/amc-list

or go to http://www.amc-list.com