Re: Automatic Transmission Rebuild/Upgrade?

Posted by HH56 On 2019/8/11 15:37:17

Finding competent people willing to work on Ultras is becoming very difficult but maybe someone in the area can recommend a good shop. The transmissions are different in operation compared to other trans of the day and mechanics knowing the ins and outs of what typically goes wrong or needs to be changed is the difficult part.

As to changing the trans the only adapter I am aware of for a 700R4 is made by Bendtsen Adapterstransmissionadapters.com/collections/packard Their kit works well and several have installed the GM trans and been quite happy. As far as I know the kit is mechanical attachment to the engine only so you will need to provide or modify your own linkage and quadrant indicator as well as do any driveshaft and maybe crossmemeber work. The bigger downside on a 54 is they use a mini starter in place of the original which means a conversion to 12V.