So what’s the thinking on 915 gearbox kits for a/6 build these days |
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So what’s the thinking on 915 gearbox kits for a/6 build these days |
Tdskip |
Oct 7 2021, 12:21 PM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
I’ve had a chance to go through some very useful past discussions, but as always win a couple years has gone by it’s worthwhile to revisit this topic The latest thinking and experiences. Looks like there’s a trade off between buying a pre-packaged kit versus trying to roll it all yourself, while expensive having someone else have done the brain damage does have a certain appeal to it.
Any thoughts or coaching out there on this? I’m assuming if you go the route of a kit do you want to have the kit in hand when the gearbox servicing and flip is done, yes? Thanks! |
slivel |
Oct 26 2021, 12:18 PM
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#2
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Old car....... older driver Group: Members Posts: 509 Joined: 10-July 04 From: San Diego Member No.: 2,332 Region Association: Southern California |
I never had significant problems with my 914 transmission in my 3.4l 290 rwhp (open exhaust) track car. Over 23 years of racing had only two failures and they were early on - one R&P and one gear-4 failure. Later, I did pull and freshen every 3 or 4 seasons and had no more failures. As I recall the pinion bearing and bearing race usually showed the most wear when we had the box apart for freshen. Because of this I would drain and replace the gear oil every season and look closely for gold flecks indicating a bearing cage was starting to deteriorate. Also had a magnet in the flow path to the oil cooler which can provide an early warning of problems.
Now the car is just a street hotrod and the gearing (AFNSY) is OK for the street. Hp is probably down 30-40 with mufflers. As has been said several times, take it easy when in first gear. 2-5 handled the rigors of racing very well. The gear box was well built with billet intermediate plate and trans cooler with oil squirters over the R&P and gears 3-4. Lastly as my transmission tech said, you can rebuild a 914 box a bunch of times for the cost of a 915 conversion. |
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