Installing a C7 7-speed Trans in a C5 Z06
05-11-2014, 02:44 PM
#22
Safety Car
I thought this would be a drop in, but I'm very pleased to see you tried to get a useful 5th and 6th out of the deal. That's the only way to get the best of both worlds. Now if you could get a .8 5th gear, I think you'd really be set! Here's to hoping Chevy pumps out a version with a short 5th.
05-12-2014, 07:40 PM
#23
Melting Slicks
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I thought this would be a drop in, but I'm very pleased to see you tried to get a useful 5th and 6th out of the deal. That's the only way to get the best of both worlds. Now if you could get a .8 5th gear, I think you'd really be set! Here's to hoping Chevy pumps out a version with a short 5th.
My guess would be that Chevy will come out with a different set of ratios for the C7 Z06. It might be the C6 ZR1 gear set with a 7th gear in the 0.42 to 0.46 range.
05-16-2014, 07:26 PM
#26
Melting Slicks
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Last edited by Pumba; 05-16-2014 at 07:29 PM.
05-16-2014, 10:27 PM
#28
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Yes, that's true. That's the reason I chose the C7 base export transmission. IMO the MN12 ratios in the C5 Z, the C6 Z51, and the C7 Z51 are very poor, and I would not use them.
Last edited by Pumba; 07-13-2014 at 08:30 AM.
07-08-2014, 08:48 AM
#29
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Gentlemen,
Back in early May I wrote a thread on the installation of a TREMEC 6070 7-speed transmission in my C5 Z06
As you can read above, everything with the RPM Transmissions installation went extremely well, except for an objectionable vibration from The Driveshaft Shop's carbon-fiber driveshaft. Their driveshaft did not have any rubber couplers.
Well, immediately after I got home with my Z, I had Jeremy at RPM give Bobby at L.G. Motorsports a call and order one of their carbon-fiber driveshafts. The L.G. driveshafts are designed to use rubber couplers.
Last Wednesday I was able to get back down to RPM, where with the expert help of Wes and Kurt, The Driveshaft Shop's driveshaft was removed and the L.G. driveshaft was installed.
RPM expertly installed C6 ZR1 couplers on each end of the new driveshaft:
The above picture shows a top-view of the C6 ZR1 coupler on the left and a standard C5-C6 coupler on the right.
Next, this is a side-view of the same two couplers, again with the C6 ZR1 coupler on top.
Finally, the above picture shows a 3/4 view of the same two couplers with the C6 ZR1 coupler on the left. Note the beefier steel sleeves and the extra thickness of the C6 ZR1 coupler.
With the new L.G. Motorsports driveshaft and C6 ZR1 couplers installed, ALL objectionable vibration is gone. Now I await Dr. Phil's completion of the tune.
HAPPY DAYS ARE HERE AGAIN ! ! !
Back in early May I wrote a thread on the installation of a TREMEC 6070 7-speed transmission in my C5 Z06
As you can read above, everything with the RPM Transmissions installation went extremely well, except for an objectionable vibration from The Driveshaft Shop's carbon-fiber driveshaft. Their driveshaft did not have any rubber couplers.
Well, immediately after I got home with my Z, I had Jeremy at RPM give Bobby at L.G. Motorsports a call and order one of their carbon-fiber driveshafts. The L.G. driveshafts are designed to use rubber couplers.
Last Wednesday I was able to get back down to RPM, where with the expert help of Wes and Kurt, The Driveshaft Shop's driveshaft was removed and the L.G. driveshaft was installed.
RPM expertly installed C6 ZR1 couplers on each end of the new driveshaft:
The above picture shows a top-view of the C6 ZR1 coupler on the left and a standard C5-C6 coupler on the right.
Next, this is a side-view of the same two couplers, again with the C6 ZR1 coupler on top.
Finally, the above picture shows a 3/4 view of the same two couplers with the C6 ZR1 coupler on the left. Note the beefier steel sleeves and the extra thickness of the C6 ZR1 coupler.
With the new L.G. Motorsports driveshaft and C6 ZR1 couplers installed, ALL objectionable vibration is gone. Now I await Dr. Phil's completion of the tune.
HAPPY DAYS ARE HERE AGAIN ! ! !
Last edited by Pumba; 07-13-2014 at 08:25 AM.
07-18-2014, 02:30 PM
#35
Supporting Vendor
Great write up!
Your C5 is AWESOME!
Your C5 is AWESOME!
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Don't forget to check out our products at www.saccitycorvette.com
If you like our products, tell others! If not, tell us!
07-18-2014, 06:15 PM
#38
Le Mans Master
sorry i am going to offend you, but more money than brains is my opinion of your swap, having 7 gears is stupid and gm only did for fuel economy and fear of epa....my opinion of course, nicely done swap but I stand by my first line, but to each their own.
07-19-2014, 12:07 AM
#40
Le Mans Master
it is not about saving the money, but I hate lining the pockets of oil companies, stations are not who make the money. I don't drive the car where premium would be worth it, I do however run premium in my other 2 vettes, both are old school 11-1 compression cars. I just made my comment on such expense on a c5, but to each their own and people should do what floats their boat. I do see you point however.