T5 ‘box Oil Change Interval?
Discussion
No but it does live a very rough environment in the TVR tub getting little natural air cooling and blasted with engine and cat heat rushing past running far hotter compared to say a Camaro, Mustang, etc that used a T5 variant etc , oil is inexpensive compared to a Tremec rebuild all IMO of course same goes for the diff I recommend every 2 years for both 
but then I am biased 
unless silly low mileage is on the cards
but then I am biased unless silly low mileage is on the cards Interesting as I’m replacing mine as part of a body off rebuild although it’s only about 5 years old and probably less then 5000 miles use.
I have to agree Dif and gearbox oil, P/S fluid should be changed fairly regularly Just as a protector of working parts.
I’m not sure how old the oil was in my T 5 box but when I got Doms boys to replace it years ago it made quite a difference in how slowly my gear stick got hot. It was replaced again after probably 8000 miles which was the last time it was changed and again the gearbox seemed really slick since. I prise the gearbox and Dif highly so agreed 2/3 years or around 8/12000 miles depending on type of usage.
I’ve opted for Morris Oils Liquimatic SuperATF Automatic transmission fluid for both gearbox P/S.
It’s supposed to be good stuff. Dexron II approved. As sold by TVR PARTS etc
I have to agree Dif and gearbox oil, P/S fluid should be changed fairly regularly Just as a protector of working parts.
I’m not sure how old the oil was in my T 5 box but when I got Doms boys to replace it years ago it made quite a difference in how slowly my gear stick got hot. It was replaced again after probably 8000 miles which was the last time it was changed and again the gearbox seemed really slick since. I prise the gearbox and Dif highly so agreed 2/3 years or around 8/12000 miles depending on type of usage.
I’ve opted for Morris Oils Liquimatic SuperATF Automatic transmission fluid for both gearbox P/S.
It’s supposed to be good stuff. Dexron II approved. As sold by TVR PARTS etc
Edited by Classic Chim on Friday 25th September 12:04
The Morris one will be fine
Mine have all had this in them to no ill effect
https://www.halfords.com/motoring/engine-oils-and-...
Mine have all had this in them to no ill effect
https://www.halfords.com/motoring/engine-oils-and-...
Belle427 said:
It’s recommended by TVR PARTS for use in T5 and power steering boxes in all the later car ranges so it better be compatible! I always thought we could use Dexron II OR III
Classic Chim said:
Belle427 said:
It’s recommended by TVR PARTS for use in T5 and power steering boxes in all the later car ranges so it better be compatible! I always thought we could use Dexron II OR III
I use Millers synthetic gear oil, noticeably quieter than when I have used standard Dextron also the Dextron used to almost burn from being overheated after a couple of enthusiastic days at Spa or somewhere else as demanding, this does not happen with the Millers.
I have taken the Cats out to help but it still suffered from overheating.
I have taken the Cats out to help but it still suffered from overheating.
Zener said:
Classic Chim said:
Belle427 said:
It’s recommended by TVR PARTS for use in T5 and power steering boxes in all the later car ranges so it better be compatible! I always thought we could use Dexron II OR III
I think with all oils on a precious car early service schedules are probably the best way to maintain clean innards and retain good lubrication qualities.
We do need oils that can take quite a lot of abuse as both box and Dif get very hot.
Ive chosen The Morris oil as I can use it in both gearbox and P/s system.
Whatever oil you choose dont over look the possibility of de-laminating the fiber faced synchro rings due to incompatible additive package 
that would be a costly f
k-up , I found harmony using this compared to the previous Dex III I had been using no more random baulking when rushed and used aggressively up shifting 2nd to 3rd https://www.morrislubricants.co.uk/products/auto/g... helps I have a Morris oil dealer next door too 
that would be a costly fk-up , I found harmony using this compared to the previous Dex III I had been using no more random baulking when rushed and used aggressively up shifting 2nd to 3rd https://www.morrislubricants.co.uk/products/auto/g... helps I have a Morris oil dealer next door too Classic Chim said:
I did look at this oil but thought it a bit too ott for my pedestrian 300 BHP Barry
How many horses are you packing through that gearbox these days
It must be good stuff
Royal Purple is expensive at £23 a quart (American quart) but thought it best.How many horses are you packing through that gearbox these days
It must be good stuff
Re the BHP, I'm now at 531
LongBaz said:
Classic Chim said:
I did look at this oil but thought it a bit too ott for my pedestrian 300 BHP Barry
How many horses are you packing through that gearbox these days
It must be good stuff
Royal Purple is expensive at £23 a quart (American quart) but thought it best.How many horses are you packing through that gearbox these days
It must be good stuff
Re the BHP, I'm now at 531
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