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The importance of dyno testing a transmission  


Bowler Sales/Tech Admin
Joined: 9 months ago
Posts: 15
15/01/2020 3:41 pm  

The importance of dyno testing a transmission

At one point or another we’ve all been in a situation where we’ve replaced a part on our hot rod and that new part didn’t work.  Nothing can be more frustrating than doing something twice, especially when you’ve just spent a few hours figuring it all out.  This can be especially true for transmissions.  Usually you aren’t lucky enough to have a lift, half of the bellhousing bolts are nearly impossible to get a socket on, and if you don’t have a dedicated transmission jack you’re stuck bench pressing it up in there or maintaining that delicate balancing act on your floor jack.  We’ve never met anyone who really enjoys the removal and installation of transmissions, so we feel it’s extremely important that when you install a new transmission, it will work the first time. 

Bowler Performance has been in the business of building transmissions for over 50 years now, and we can tell you without a doubt, that our transmission dyno is one of our most valuable pieces of equipment.  The transmission dyno is the best way to re-create a real world scenario to ensure that the transmission we ship to you does everything we promise it will.  Most dynos will be powered by an electric motor or gas engine along with a set of gauges and sensors to monitor the pressures and temperatures inside the transmission being tested.  The dyno we use here at Bowler Performance is a custom built unit that incorporates a big block Ford engine that produces about 550 ft/lbs of torque coupled with an electromagnetic braking system that can replicate an 800 ft/lb torque load on the transmission.   If there is an issue with any one component in the transmission we will know 99.9% of the time before it ever leaves our shop so that we can save you the time and frustration of removing and replacing that transmission again due to a faulty part.  We dyno test transmissions because we care about the product we are selling you, and believe it or not, we’ve found and fixed many “faulty” new parts that were installed into transmissions because the dyno exposed the issue.  These would’ve otherwise been transmissions that were sent out in good faith, but ultimately would’ve failed once they were installed.

Transmission dynos are expensive, and usually your local rebuilder will not have one available.  This is not to say that their transmission will fail, but you should be cautious of what their warranty or guarantee is, otherwise you will be the one stuck with the bill to pull it back out, wait for it to get repaired again, and then put it back in.  The transmission dyno allows us to check for proper line pressures, gear and clutch engagement, proper operation of the solenoid valves, and any other specific functions that particular transmission needs to do perfectly.  For all the electronically operated transmissions, the dyno also gives us the opportunity to set up, program, and test the controller for proper operation in the project it is being built for.  Another key benefit of the dyno is that it exposes any possible leaks that may occur, because a leaky new transmission will definitely ruin your day. 

We believe that no matter what level we are building the transmission for it deserves to be checked and tested to the fullest extent.  There isn’t a process or procedure that is any less important on a stock type build than it is for a full out race build.  When you’re shopping around for a new transmission take the time to ask questions and educate yourself about what the transmission builder is doing for the amount of money being charged.