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13B with Powerglide or TH400

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Old 06-05-18, 09:54 AM
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13B with Powerglide or TH400

Hey guys, I've been trying to search around this forum and find some feedback/info on running a Powerglide or TH400 on a 13B. Haven't had much luck so anyone with experience on this, please chime in! I know there are a couple companies are making a kit to adapt the trans to the block but wasn't sure which one people preferred.

I'm debating on which of the 2 transmissions to run because I've heard that the additional rotating mass inside of the TH400 really kills the power but I would still like to drive the car on the street, even though it will primarily be a drag car.

Plans for my setup are pretty basic- Built/Studded SemiPP 13B, BW S475 T6 turbo, Powerglide or TH400 with Transbrake. Power goals will be 800-850whp @ around 9000rpm.

Any help is appreciated!
Thanks guys!
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Old 06-05-18, 07:35 PM
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There was a guy local to me that ran a C4 transmission on his turbo 13b setup.
Think the car was around 600whp or so.
Car ran awesome and would run within a tenth each pass. Super consistent.

In my opinion a three speed would be better suited to your setup. TH400 or C4. I'd run the TH400.
The converter is going to be the most important part.
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Old 06-06-18, 10:35 AM
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Originally Posted by krazy4 View Post
There was a guy local to me that ran a C4 transmission on his turbo 13b setup.
Think the car was around 600whp or so.
Car ran awesome and would run within a tenth each pass. Super consistent.

In my opinion a three speed would be better suited to your setup. TH400 or C4. I'd run the TH400.
The converter is going to be the most important part.
That Auto consistency is hard to beat that's why I'm leaning this route rather than a 6-speed, which would ultimately be more fun to drive on the streets.
The TH400 seems like a good choice but the extra weight that robs power has me a little concerned. With the PG, the converter is going to have to be spot on for it to come off the line properly.

How did the local guy mount the C4 to the 13B?
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Old 06-06-18, 07:35 PM
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Look up Lowe performance.Mike Lowe had a glide behind his 13b.
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Old 06-07-18, 08:30 AM
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Originally Posted by 1BADSP View Post
Look up Lowe performance.Mike Lowe had a glide behind his 13b.
I just did a quick google search and couldn't find any thing on him.
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Old 06-07-18, 08:55 AM
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UPDATE: I've been talking with Jose @ NCTransmissions (NC Transmission - Racing Automatics -) out of PR and he's actually got what I'm looking for. He has ran both a TH400 and a PG and strongly recommended the PG due to the lighter weight. He has a 5pc adapter/conversion kit that includes a custom starter, SFI flexplate, custom torque converter, bellhousing adapter plate, and SFI bellhousing. Just put my deposit down on it this morning. If anyone is looking to go this route, Jose is very knowledgeable and had no problem taking the time to explain why he recommends what he does. I didn't get that kind of service when talking with the "other" company.
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Old 06-07-18, 03:07 PM
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Cool, sounds like you got it all figured out.
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Old 06-07-18, 03:52 PM
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Originally Posted by krazy4 View Post
Cool, sounds like you got it all figured out.
Working on it. At least this piece of the puzzle is figured out. Now I have to look into a built Powerglide so its capable of shifting at 9500RPMS
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Old 06-10-18, 01:03 PM
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Heard nothing but good things about the guys down there.

What is your plans to keep the fluid cool? Ive heard guys putting the trans cooler in a ice chest.
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Old 06-10-18, 08:51 PM
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I spoke with Jose years ago on going this route. but at the end of the day it's hard to get them to cut a light. also not fun street driving a 7000rpm stall.
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Old 06-11-18, 01:41 PM
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Originally Posted by sleeper7 View Post
Heard nothing but good things about the guys down there.

What is your plans to keep the fluid cool? Ive heard guys putting the trans cooler in a ice chest.
I plan on just running a standard transmission cooler. Jose didnt seem to be very concerned with a some street driving since the PG transmissions were used in passenger cars back in the 60's.

Originally Posted by sk8world View Post
I spoke with Jose years ago on going this route. but at the end of the day it's hard to get them to cut a light. also not fun street driving a 7000rpm stall.
It shouldn't be too hard to cut a light off a trans brake, I wouldn't think. I wont be driving it on the street too often since I've got a CTS-V for street duty. The times I do drive it, having a 7000 stall will definitely be interesting.
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Old 06-13-18, 09:56 AM
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Also, Give Andy @ WWR Turbo Injection in Miami a call. He makes/sells a kit that is proven to work really well.
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Old 06-13-18, 03:05 PM
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Originally Posted by freddyrx3 View Post
Also, Give Andy @ WWR Turbo Injection in Miami a call. He makes/sells a kit that is proven to work really well.
I checked out his site but didn't find too much. I've got my order into NCTransmissions currently and Jose seems to have an abundance of knowledge on these as well.
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