transmission test stand

Dragsinger · 04-27-2015, 07:24 PM

I am considering building a trans testing fixture. It would be race only powerglides and maybe 3 speeds.

Chevy bolt pattern GM trans only.

All I have is the idea so am open to suggestions. Do any of you have or know of such a test device? Or suggestion of how to?

MR DERBY CITY · 04-27-2015, 09:51 PM

Seen plenty in my day. Everyone started off with a worn out small block Chevy on a portable engine stand. Bolt your trans to the rear of the engine and there ya go. M.J.

SSGT Mustang · 04-27-2015, 10:51 PM

I was thinking about the same thing just yesterday. I was thinking about using an 20 HP electric motor. I wonder if it would have enough power to do the job.

Dragsinger · 04-27-2015, 11:42 PM

We need to hear from an electrician about the service required for an electric powered tester.

I expect something like a 480 volt 3 phase will be required so not practical for most shops. In addition, I think a gas engine will give better control of load and speed.

I have enough SBC 350 parts to easily build a low cost stock engine.

The thing I need to learn is how to load the output shaft. On DRR site someone posted a video of the FTI tester and it has a disc brake setup for the output load.

NORMAN BARNARD · 04-27-2015, 11:55 PM

Larry, not to hi-jack your thread but i've been looking for something like what your looking for that i can put a load on the motor to check afr readings at different rpm's as i do a lot of circle track carb's. And modifications for the racer for different altitudes. I checked with msd in my area but they don't have anything available in there design that will work as a load.

I'll monitor the web site maybe we can solve both our needs.

Norm

Dragsinger · 04-28-2015, 12:33 AM

Norm, yes, sounds like the same style setup would do both jobs.

The key will be some way to safely load the output shaft without building huge heat. Just now I am visualizing a large disc brake rotor with large caliper. Maybe 2500 series truck parts.

A simple single master cylinder with a long handle to apply load.

What I do not have is a mental picture of is how to adapt a brake rotor to the output shaft with an easily removed, stable, no runout setup.

Maybe someone will have a simple idea.

04-27-2015, 07:24 PM	#1
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	transmission test stand I am considering building a trans testing fixture. It would be race only powerglides and maybe 3 speeds. Chevy bolt pattern GM trans only. All I have is the idea so am open to suggestions. Do any of you have or know of such a test device? Or suggestion of how to? __________________ Larry Woodfin 471W

04-27-2015, 09:51 PM	#2
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,608 Likes: 1,068 Liked 7,783 Times in 1,495 Posts	Re: transmission test stand Seen plenty in my day. Everyone started off with a worn out small block Chevy on a portable engine stand. Bolt your trans to the rear of the engine and there ya go. M.J.

04-27-2015, 10:51 PM	#3
SSGT Mustang Member Join Date: Mar 2005 Location: Jersey Posts: 359 Likes: 35 Liked 204 Times in 54 Posts	Re: transmission test stand I was thinking about the same thing just yesterday. I was thinking about using an 20 HP electric motor. I wonder if it would have enough power to do the job.

04-27-2015, 11:42 PM	#4
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: transmission test stand We need to hear from an electrician about the service required for an electric powered tester. I expect something like a 480 volt 3 phase will be required so not practical for most shops. In addition, I think a gas engine will give better control of load and speed. I have enough SBC 350 parts to easily build a low cost stock engine. The thing I need to learn is how to load the output shaft. On DRR site someone posted a video of the FTI tester and it has a disc brake setup for the output load. __________________ Larry Woodfin 471W

04-27-2015, 11:55 PM	#5
NORMAN BARNARD Member Join Date: Mar 2006 Location: EL PASO, TEXAS Posts: 156 Likes: 0 Liked 2 Times in 2 Posts	Re: transmission test stand Larry, not to hi-jack your thread but i've been looking for something like what your looking for that i can put a load on the motor to check afr readings at different rpm's as i do a lot of circle track carb's. And modifications for the racer for different altitudes. I checked with msd in my area but they don't have anything available in there design that will work as a load. I'll monitor the web site maybe we can solve both our needs. Norm

04-28-2015, 12:33 AM	#6
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: transmission test stand Norm, yes, sounds like the same style setup would do both jobs. The key will be some way to safely load the output shaft without building huge heat. Just now I am visualizing a large disc brake rotor with large caliper. Maybe 2500 series truck parts. A simple single master cylinder with a long handle to apply load. What I do not have is a mental picture of is how to adapt a brake rotor to the output shaft with an easily removed, stable, no runout setup. Maybe someone will have a simple idea. __________________ Larry Woodfin 471W