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Jeff20B · 01-17-2009, 01:22 AM

From memory, the REPU rear gear list is:

74 manual 4.625
74 auto 4.3
75 manual 4.3
75 auto 4.11
76 manual 4.11
76 auto 3.9
77 auto and manual 3.9

I don't know what year or gear ratio my truck has, but it is a later '74 model, so could actually have a '75 rear gear ratio, or could have started life as an auto truck. Is there anything in the VIN that would say?

I have towed with the truck before, but the engine was never all that powerful. It has always been a gutless wonder, with power robbers ranging from a crappy restrictive exhaust to a crappy engine that Ken Durkee built using an NO intermediate plate (small ports) and lots of missing chrome in the rotor housings. Those issues have been solved and now I'm just wondering about the clutch setup.

I really did appreciate the stock REPU setup for its smoothness and strength. I just didn't like the heavy flywheel under normal driving conditions, and my disc was worn to less than 7mm uncompressed. My old white REPU that percent now has, has a much less worn stock setup, and it drives wonderfully (although still on the heavy side if you've just driven something light).

For the new engine, I was going to use the 225mm SS pressure plate for its similar gripping force and a light steel flywheel and the added weight of the SC would probably add up to nearly the weight of a GSL-SE flywheel (or at least that is kinda how it felt in the blue RX-7). I was fighting with myself over whether or not to use an HD disc or a stock disc. Then along came the CF DF setup.

Hey, if you say the CF DF setup won't last long in the REPU like getting things rolling from a stop, where my friend's setup has the most trouble, I'm all for changing my plans.

How long do you think a stock 225mm disc will live in an REPU? Or am I better off with an HD disc and live with the shuddering? It's very awesome to have you input on this since you've driven a CF DF before.

01-17-2009, 01:22 AM	#38
Jeff20B Rotary Fanatic Join Date: Mar 2008 Posts: 215 Rep Power: 18	From memory, the REPU rear gear list is: 74 manual 4.625 74 auto 4.3 75 manual 4.3 75 auto 4.11 76 manual 4.11 76 auto 3.9 77 auto and manual 3.9 I don't know what year or gear ratio my truck has, but it is a later '74 model, so could actually have a '75 rear gear ratio, or could have started life as an auto truck. Is there anything in the VIN that would say? I have towed with the truck before, but the engine was never all that powerful. It has always been a gutless wonder, with power robbers ranging from a crappy restrictive exhaust to a crappy engine that Ken Durkee built using an NO intermediate plate (small ports) and lots of missing chrome in the rotor housings. Those issues have been solved and now I'm just wondering about the clutch setup. I really did appreciate the stock REPU setup for its smoothness and strength. I just didn't like the heavy flywheel under normal driving conditions, and my disc was worn to less than 7mm uncompressed. My old white REPU that percent now has, has a much less worn stock setup, and it drives wonderfully (although still on the heavy side if you've just driven something light). For the new engine, I was going to use the 225mm SS pressure plate for its similar gripping force and a light steel flywheel and the added weight of the SC would probably add up to nearly the weight of a GSL-SE flywheel (or at least that is kinda how it felt in the blue RX-7). I was fighting with myself over whether or not to use an HD disc or a stock disc. Then along came the CF DF setup. Hey, if you say the CF DF setup won't last long in the REPU like getting things rolling from a stop, where my friend's setup has the most trouble, I'm all for changing my plans. How long do you think a stock 225mm disc will live in an REPU? Or am I better off with an HD disc and live with the shuddering? It's very awesome to have you input on this since you've driven a CF DF before.