Cerbera T5 transmission, WC or nont WC?
Discussion
I am about to replace the transmission oil in my cerbera, the factory manual recomends Mobil ATF 220 (automatic transmission fluid) which is what I drained out of there, however further investigation on the internet reveals there are two varieties of T5 box, designated World Class and Non World Class.
The recomendadtion for lubricant is:
"All NWC T-5 use 70WT Gear Oil or Redline MTL.
ALL WC T-5 use ATF.
Do not use gear oil in a WC T-5. Use a quality synthetic oil"
More worryingly:
"All the V8 NWC boxes had 2.95 first gear set with .68 overdrive. All the main output shaft gears and 1st, 2nd, 3rd, gears riding on a solid output shaft with deep oil grooves to provide lubrication. The lower counter gears spin on straight cylindrical bearings with a thrust washer in front to provide support when under load. All the synchronizer rings are made of solid bronze which are of different size than those found in a would-class T-5. It is because there is no bearing under each gear and the bronze synchro rings that the NWC use the heavy 70w gear oil. "
source: http://www.moderndriveline.com/Technical_Bits/t5_h...
...and when I look in the cerbera handbook it gives the 1st gear ratio as 2.95!
So have we been wrongly using automatic transmission fluid in these boxes?
The recomendadtion for lubricant is:
"All NWC T-5 use 70WT Gear Oil or Redline MTL.
ALL WC T-5 use ATF.
Do not use gear oil in a WC T-5. Use a quality synthetic oil"
More worryingly:
"All the V8 NWC boxes had 2.95 first gear set with .68 overdrive. All the main output shaft gears and 1st, 2nd, 3rd, gears riding on a solid output shaft with deep oil grooves to provide lubrication. The lower counter gears spin on straight cylindrical bearings with a thrust washer in front to provide support when under load. All the synchronizer rings are made of solid bronze which are of different size than those found in a would-class T-5. It is because there is no bearing under each gear and the bronze synchro rings that the NWC use the heavy 70w gear oil. "
source: http://www.moderndriveline.com/Technical_Bits/t5_h...
...and when I look in the cerbera handbook it gives the 1st gear ratio as 2.95!
So have we been wrongly using automatic transmission fluid in these boxes?
Cerbera's have The WC T5 Box, So use ATF.
Read these...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.5speeds.com/t5/
(Thanks to Ed Horne)
Read these...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.5speeds.com/t5/
(Thanks to Ed Horne)
Edited by JensenA on Friday 19th March 22:51
Thanks guys, so it seems like a pretty safe bet all Cerbs are fitted with the WC t5, howver knowing TVR there is always a possibility they used whatever was lying around.
So the suggested external check is to look at the "counter-shaft bearing cup, just below the bearing retainer" which is great, and they show a picture of what the counter-shaft bearing cup looks like, however is it visible from underneath the car?
So the suggested external check is to look at the "counter-shaft bearing cup, just below the bearing retainer" which is great, and they show a picture of what the counter-shaft bearing cup looks like, however is it visible from underneath the car?
Here's another link
http://www.britishv8.org/Articles/Borg-Warner-T5-I...
Just for info, I found the oil quantity in the hand book to be wrong, after a full drain and refill mine swallowed just over 2 litres.
http://www.britishv8.org/Articles/Borg-Warner-T5-I...
Just for info, I found the oil quantity in the hand book to be wrong, after a full drain and refill mine swallowed just over 2 litres.
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