captmarv Member 24 Member For: 20y 3m 24d Location: Melbourne Posted 04/09/23 10:57 AM Share Posted 04/09/23 10:57 AM Hi guys. It's been a while. I am looking to install a new auto into my GTP that will comfortably handle the power and not melt. Can anybody suggest somebody that knows what they are doing and what transmission they would recommend? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,917 Member For: 16y 6m 24d Gender: Male Location: Melbourne Posted 04/09/23 11:44 AM Share Posted 04/09/23 11:44 AM how much power does it make... ? Link to comment Share on other sites More sharing options...
captmarv Member 24 Member For: 20y 3m 24d Location: Melbourne Posted 04/09/23 09:41 PM Author Share Posted 04/09/23 09:41 PM (edited) Only 465rwkw at this stage. I had converted it to manual because I melted 3 auto's but the power delivery is much better with auto than manual. Need something that will handle more horsepower and not overheat Edited 04/09/23 09:42 PM by captmarv Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,917 Member For: 16y 6m 24d Gender: Male Location: Melbourne Posted 04/09/23 11:07 PM Share Posted 04/09/23 11:07 PM which auto's have you used? Link to comment Share on other sites More sharing options...
captmarv Member 24 Member For: 20y 3m 24d Location: Melbourne Posted 05/09/23 12:25 AM Author Share Posted 05/09/23 12:25 AM Rebuilt the factory fitted one Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,917 Member For: 16y 6m 24d Gender: Male Location: Melbourne Posted 05/09/23 12:46 AM Share Posted 05/09/23 12:46 AM Go with either a TH400 or a Powerglide. Optionally add an overdrive for highway cruising. Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 320 Member For: 13y 9m 15d Posted 06/09/23 01:03 AM Share Posted 06/09/23 01:03 AM If you're rich, 6L90 Circle d triple plate 2800+rpm stall with woven fibre clutch discs suited for PWM lockup TCM-2650 + 6L90 wiring kit. Link to comment Share on other sites More sharing options...
captmarv Member 24 Member For: 20y 3m 24d Location: Melbourne Posted 06/09/23 01:21 AM Author Share Posted 06/09/23 01:21 AM Thanks for that. Just looked up the price. would be nice sadly outside the budget Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,821 Member For: 9y 9m 5d Gender: Male Location: South Australia Posted 06/09/23 01:49 AM Share Posted 06/09/23 01:49 AM Built zf6 without a doubt. It's actually designed to fit the car, it is designed to work with the factory pcm and is tunable through the same system, it has a lockup converter for economy (also tunable), more ratios=more better in a street car, less likely to overheat compared to 70 yo transmissions, can be modified into a 3 speed for drag racing with relative ease, extremely common in wrecking yards for sourcing, you won't need a custom tail-shaft or shifter, many more things to add but not much point writing a novel. For your power level, if you can fit and tune it you'll be around the 5 to 10k mark depending on options, add a few thousand more for fitting and tuning depending on the tuning work carried out. The pcm tune needs to be done as well as the tcm tune, they work together and as such should be tuned together. Just my 2c, you might prefer something else and that is fine Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,917 Member For: 16y 6m 24d Gender: Male Location: Melbourne Posted 06/09/23 01:58 AM Share Posted 06/09/23 01:58 AM it's a real pain to get a ZF6 to work in a BA... but I guess it's an option Link to comment Share on other sites More sharing options...
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