Author Topic: Transmission options for Supra motor??  (Read 4986 times)

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supratruck

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Transmission options for Supra motor??
« on: Dec 18, 2002, 03:53:13 AM »
I posted this in technical questions last week. I am researching Transmission options for my truck. I am currently running a W56 trans w/ a swapped bell housing behind a 5M-GE Supra motor w/a turbo. The tranny has 150k on it and makes some nasty bearing noise. I want to put in a Toyota R-series tranny for strenght. The plan is to use a R154 clutch assembly ,bellhousing, and input shaft with a R150(for availability) or R151f maincase , the R154 fifth gear, and my current transfer case converted to 23-spline. My truck is primarily street driven due to the lack of terrain in NW Ohio (it used to be a swamp), so I am leaning towards the V6 tranny. I currently know that the bellhousing will bolt up and that the bearings for the input shaft are the same between all three transmissions. My questions are:  
Does the gear on the end of the input shaft for the Supra tranny match up to the the transfer gear on the countershaft of the other trannys?
Can I use the tailhousing from the R151f on the R150, instead of using the V6 adapter?

« Last Edit: Dec 31, 1969, 04:00:00 PM by 1056988800 »

Cracker

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Re: Transmission options for Supra motor??
« Reply #1 on: Jan 30, 2003, 12:04:07 PM »
From the research I've done, and stuff I've read, No the Supra input will not work in the other R-series trannies.
UNLESS you swap ALL of the gears and shafts in the R151/R150 with those from the R154.
But if you're gonna do that, ya might as well run the R154 case, and swap out the rear output and tailhousing with one from the other R-series.
But then, you're still stuck with the higher Supra gearing... :change:

I think the best/cheapest option would be to have a custom bellhousing made. Basically it just needs to be an existing Supra bellhousing shortened by 30mm, and to have the location for the starters swapped.
If anyone knows of a shop or foundry that could cast a custom bellhousing, drop me a line. I would be interested in getting some made.
« Last Edit: Dec 31, 1969, 04:00:01 PM by -1 »
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Re: Transmission options for Supra motor??
« Reply #2 on: Jan 30, 2003, 04:34:19 PM »
Quote
behind a 5M-GE Supra motor w/a turbo.

So did you do the Custom Turbo your self?
Which turbo are you running? C26?

Quote
Does the gear on the end of the input shaft for the Supra tranny match up to the the transfer gear on the countershaft of the other trannys?

We really need Marlin for these kind of questions. He would answer this in a heart beat.

Quote
Can I use the tailhousing from the R151f on the R150, instead of using the V6 adapter?

Absolutely!

Regards,
BigMike
« Last Edit: Dec 31, 1969, 04:00:00 PM by 1056988800 »
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supratruck [OP]

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Re: Transmission options for Supra motor??
« Reply #3 on: Jan 31, 2003, 02:55:54 AM »
Its a 7M turbo manifold with a ct26 turbo on an early 5M-GE motor (8.8:1 compression not 9.6:1), currently no intercooler(I could barely find room for the radiator). It only runs about 5.5 psi of boost. Estimated hp is about 200. It was originally only going to be the 5M motor but I started hanging out with a couple auto-Xers. When I get an intercooler, I'll put the boost up to 10-12 psi and that should make about 250-270hp.
« Last Edit: Dec 31, 1969, 04:00:00 PM by 1056988800 »

Paul_Elbisser

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Re: Transmission options for Supra motor??
« Reply #4 on: Jan 31, 2003, 06:56:57 AM »
I am wondering if this is overkill. My w56 went out just under 200K. It was making noise for about 50K miles.

Alot of people have beenrunning this trans with american V6 swaps. The import puts the power at higher RPM. Could this make a diference? I don't know just something to think about.

Also Marlin has a HD W56 set up with better bearings. May be the easiest thing. It seams like you know how to take a trans apart, this could be something you can put in yourself.

From marlins site
W56-HD 5spd 1985-1991


Longer Lasting Bearings - Ideal for Power Upgrades

Increased Ball Bearing Count

Just a thought. Big Mike, any info on this upgrade?
« Last Edit: Dec 31, 1969, 04:00:00 PM by 1056988800 »
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supratruck [OP]

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Re: Transmission options for Supra motor??
« Reply #5 on: Mar 07, 2003, 03:46:33 AM »
Finally decided what to do with the tranny. I just ordered the W56 HD rebuild kit. I'm gonna try to put it in over spring break. If I still break it I'll look in to the other idea.

Thanks for your input guys.

Now if I could only get better than 12mpg.
« Last Edit: Dec 31, 1969, 04:00:00 PM by 1056988800 »

 
 
 
 
 

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