Rebelord

iTrader: (2)

Alright guys. The TH400 sticky is waaayyy outdated. Has there been any breakthroughs and new write ups for swapping in a th350/400? The only things I can find is you can extend or get a new crossmember, stock d/s work with long tailshaft housings and very little else. anyone have any links to useful information? I am about to do the swap. I was able to get a th350 for free. I'm taking the swap on.

Ski

CAT3

iTrader: (9)

I've posted a bit on this topic, answering other ppls ?'s.
Whats needed:
Trans
Converter
Flexplate, either a 98, or a Dual Bolt Pattern (TCI, ATI, Fidenza etc...)
Dipstick, 36" Lokar works great (Jegs/Summit, call and specify 36" length) or Madman.
Crossmember, stock one can be modded but its heavy. BMR or Yank tubular.
Speedo Option1, use a wheel speed sensor, cut the wires and rig it up losing ABS, or Option 2 call Carl Rossler and get a 9" tailshaft with VSS mount and use stock VSS.
Shifter, pick it. I'm using a B&M Pro-Ratchet.
Tuning, I heard you can write it as an M6, however I just deleted the A4 codes and used my same tune.
Wiring for Reverse Lights and Neutral Safety Switch (NSS), there are a few posts in here about which wires get cut and go to the Micro Switches mounted on new shifter.

I would recommend getting ARP M6 Flywheel bolts to use on the new flexplate. The TCI and ATI plates are slightly thicker and may or may not require a washer, but definately use red locktite.

Thats really it. Its so much easier to pull a TH350 than the 60E, more room around the housing bolts.

GL

Charlie

Rebelord

iTrader: (2)

Thanks, check your PMs.

Honda Hunter

iTrader: (8)

What's the cost for everything new?

Rebelord

iTrader: (2)

Around $2500-3000.
But, you can probally find a th350 used for cheap and have it rebuilt good for less than a new one. I happen to already have one, and tired of tearing up my 4l60e. Spent too much money trying to keep it alive.

Ski

Honda Hunter

iTrader: (8)

What type of power are you making?

Rebelord

iTrader: (2)

um..probally around ~380ish. But I'm getting tuned at the end of the month. I'll know more for sure then. But I'm cam only F14 and most have resulted in ~380-400. Depending on mods and other factors. I'm not looking for a dyno queen. It will show its true self on the track.

Ski

chrdij

iTrader: (1)

i am about to do the swap with my TH350..had one hell of a time trying to find a 9" tail housing! But the problem I ran into is the TA mount. Is there a way around the mount w/out buying another TA?

Rebelord, I know what you mean by tearing up these 4l60es, just killed my 4th one (built). Time for an upgrade!

revtime

iTrader: (1)

I only killed 2 before going with a Rossler TH400.
BMR makes a transmission conversion crossmember that has a mount for the TA. I went with one for the TH400 so I could keep my BMR adjustable TA that I already had.

GARYOLA

hi..

I am intending to do the swap with th350 tranny for my 1999 camaro. I have got the tranny along with a dual pattern TCI converter(part # TCI-241000)

My question is, would my converter fit with the stock flexplate??

Also, summitracing and ls1speed are offering a crank adapter for the conversion. What is the use of that adapter and do I need it if I have got the 98 flexplate??

Strahley

iTrader: (4)

I think the stock 1998 LS1 flexplate fits the th350. I'm pretty sure that's what mine is using

GARYOLA

When u say fits you mean without any holes drilled in the 98 flexplate, right?

What about the stock d/s, does that need any modification to fit with the long tailshaft th350???

DarkFormula

iTrader: (80)

Yes, the '98 flexplate fits the bolt pattern and bigger diameter bolts used in the swap.

CAT3

iTrader: (9)

You can get a spacer for the TC, or get a TC built for the application. 98 has correct bolt patter. Stock DS will work with TH350 9" tailshaft. Rossler has a 9" tailshaft with VSS bung welded in so speedo will work and ABS, if you use the speed sensor from the front wheel "free speedo fix" you lose the ABS.

GARYOLA

hi..

Thanks for the info everyone.

One other question...What is the purpose of the TC spacer???do I need it if I have a dual pattern converter???

LC

suscribed for future reference...

ALL UC2

iTrader: (4)

i used

lokar 36" dipstick
9" tail th350 basic stock rebuild with shift kit
98 flexplate
tci 4000 race converter for sbc
and extended my stock cossmember


i didnt use a crank spacer and i havent had any problems yet. i just used red threadlocker and a lock washer on the tc bolts.

everyone is buying built th400 and 350s, but in my opinion i dont think they are needed. i have a ton of friends that make more power than me and use STOCK th350s with a shift kit and have nnnnnnooooooo problems. not to say a 600 rwhp car dont need a built one, but i think under 500 they will handle. i would like to hear other people opinion on this.