700r4: Someone kill me...

[jonrpick]

After careful thought and some tinkering with the POS 700r4 in my burb I've come to the conclusion: It's dead.

It won't even engage gears cold now. Time to cut the emotional ties and let it go.

MY DECISION: Th400

I know I lose OD and a few MPG. I don't care really. This is a camping rig and will barely see the highway (I live 200 yards from BLM land in NV).

I see advance adapters makes a conversion kit from 700r4 to TH400. They claim I can use the stock transfercase, crossmember, and drive lines without any issues. Is there truth to this? Yeah, the adapter is pricey in my opinion (LIKE $475), but I'm tired of dealing with 700r4 "picky-ness".

Anyone used this thing? I can't download the install guide: Will I need to change the trans output shaft? What kind of vechicle(s) should I be looking at to find the trans I'll need(year, model, options)?

Much thanks in advance!

I'm new to the GM world, so your help is keeping me going!

Without you guys, I'm just another sad ex-yota runner

I'm gonna stay with my 700R4. If I ever need to rebuild, it'll get this:

http://www.powerandperformancenews.com/Technical/Newsletters/Files/PAPNV4I1.htm#1

Thread about it here: http://coloradok5.com/forums/showthread.php?t=222573

 

[BurbanHunter]

I agree... If it was my DD. But I want something heavier duty! And MPG's don't concern me.

And someone please correct me if I am wrong but: Didn't the 3/4 ton Suburbans all come with TH400s??? Making it the "heavy duty" trans to have?

Why they put a car and light truck trans in a hefty 1/2 ton burban I'll never know!

Corrections please? Am I wrong/right? Or is this just a personal preference?

To the GM brotherhood

 

[southernspeed]

I'm gonna stay with my 700R4. If I ever need to rebuild, it'll get this:

http://www.powerandperformancenews.com/Technical/Newsletters/Files/PAPNV4I1.htm#1

Thread about it here: http://coloradok5.com/forums/showthread.php?t=222573

I missed your other thread on that valve body. Interesting idea but I can't help but think you're going to get some pretty damn firm light throttle shifts.
I've got a TCI shift kit and the Jet apply servos and it's way to harsh on WOT upshifts, I'd hate that kind of shift all the time.

 

[BurbanHunter]

Help Quick

I found an 84 TH400 out of a 3/4 ton suburban WITH transfercase!

Will it fit with the advance adapters TH400 adapter?

What are my possible x-case options bolted to this?

I need opinions quick as I would like to get this thing tomorrow!!

 

[uglytruk]

Just bolt in da TH400 with the 208(?) TC. Who needs an adapter? Is it the aluminum 208. should have a tag in da back..

I would guess the split for TH400 and 700R4 is 50-50. I've had dayz where no OD's, and days were seen 3 in a row... I check eBay and CL all da time. I have 5 Subs, 4 6.2's, only 1 is a TH400, 1 gas 3/4 is a TH400, and more 1/2 tons had the 700, if not all... Def not GM's HD choice...

My '87 Sub 3/4ton 6.2 TH400 208... LOL!!!

 

[BurbanHunter]

Problem solved! (or so I hope)

Today I picked up a TH400 "HD"/NP208 combo out of an 84 3/4 ton Suburban. Tranny looks good, fluid is nice and red in color. The guys's suburban blew his 350 so he sold it, kept the trans and t-case to use later. Never ended up using it, so I picked it up for....

$100

So on to the swap questions(going in a 90 GMC Burb 1/2t):

Would this be a direct bolt in?

Or would I need crossmember/drivelines from another 3/4t?


Things I see i need as of right now:

Cooler lines
Vacuum line from a factory 350/th400

Any other ideas? Throw 'em at me, I'm new to this so I can use all the help/criticism I can get!