996tt 1mph faster in reverse vs 1st?
02-23-2019, 02:37 PM
#1
996tt 1mph faster in reverse vs 1st?
I just picked up my 2003 996tt from the shop today, after having the following work done:
1.) Transmission complete rebuild w/ same gear ratios
2.) RS clutch
3.) LMFW Aluminum
4.) BBI clutch slave conversion
5.) 997 short shifter & shifter cables
6.) Semi-solid engine mountsi
7.) Semi-solid transmission mount
8.) New wheel bearings
When I went to drive it, reverse felt a lot faster than before and faster than first gear. I took it back to the shop and sure enough, after my mechanic gave a strange look, he confirmed that the car was 1mph faster in reverse than 1st gear. The guy that rebuilt the transmission was also at the shop and was unable to figure out why this was happening.
Has as anyone experienced this when changing out the dual mass fly wheel? Any thoughts? It just does not make mechanical sense.
Items 4 through 8 are not in question, but included to capture the whole job.
1.) Transmission complete rebuild w/ same gear ratios
2.) RS clutch
3.) LMFW Aluminum
4.) BBI clutch slave conversion
5.) 997 short shifter & shifter cables
6.) Semi-solid engine mountsi
7.) Semi-solid transmission mount
8.) New wheel bearings
When I went to drive it, reverse felt a lot faster than before and faster than first gear. I took it back to the shop and sure enough, after my mechanic gave a strange look, he confirmed that the car was 1mph faster in reverse than 1st gear. The guy that rebuilt the transmission was also at the shop and was unable to figure out why this was happening.
Has as anyone experienced this when changing out the dual mass fly wheel? Any thoughts? It just does not make mechanical sense.
Items 4 through 8 are not in question, but included to capture the whole job.
02-23-2019, 02:51 PM
#2
Maybe your wheel sensors aren’t calibrated correctly, I’ve owned over 75 cars and can honesty say that I have never tested a comparison between forward and reverse maximum speed with any of them.
02-23-2019, 03:14 PM
#4
It also feels significantly faster in reverse and faster than before I had the work done.
02-23-2019, 03:24 PM
#6
02-23-2019, 04:04 PM
#7
Drifting
At that speed there is almost a 25% difference. It makes it difficult to back out of parking spaces without launching into traffic and at these speeds difficult to back up into tight spots or onto a trailer. At idle it’s 7mph in reverse and 1st 6mph. 1mph may not seam like a lot, until your behind the wheel (I would have had the same reaction that you did, until I experience it).
I can understand your concern.
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02-23-2019, 04:30 PM
#8
Rennlist Member
maybe he swapped out first and reverse when rebuilding?
maybe drive it in reverse? also
sorry couldn't help myself
never heard of this something is up, probably need to take her (trani) apart again and see whats going on
maybe drive it in reverse? also
sorry couldn't help myself
never heard of this something is up, probably need to take her (trani) apart again and see whats going on
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02-23-2019, 09:39 PM
#15
Thanks for asking. No. This is my first experience driving a with a LMFW. I was also told by my mechanic that all of the transmission/gear noise (very loud compared to stoc. It sounds like your tenth rattling) was probably due to the elimination of the dual mass flywheel. The sound does not bother me but was concerned that all was ok. He said that was the reaction from everyone that had this mod.
