T5 gearbox oil - who's not using ATF?
Discussion
Having searched the Griffith and Chimaera forums I see that '350matt' advocates the use of Castrol SMX-S gearbox oil in the T5 gearbox...
350Matt said:
...Castrol's SMX-S gearbox oil is far better for the box, gives superior shift quality and you're much less likely to seize 5th on its shaft ( no real bearing under the gear just relies on oil film).
I know its says ATF on the box however at a previous job involving the T5 gearbox I was told by the head of Tremec's R & D dept that the only reason they spec'd ATF was cost, as a gearbox oil its rubbish.
I'm wondering who else is using something other than ATF in their T5 gearbox?I know its says ATF on the box however at a previous job involving the T5 gearbox I was told by the head of Tremec's R & D dept that the only reason they spec'd ATF was cost, as a gearbox oil its rubbish.
I complained about the 390SE change into second gear when cold, the dealer - Drakes Broughton told me that the factory fix was to replace the gearbox oil with ATF. But he said that the gearbox would not last as long, especially if heavily loaded like you get on a 390. The ATF would also go through the front and rear oil seals more quickly when warm.
I had the oil replaced with AmsOil synthetic and 50,000 miles later the gearbox is still working and still a bit baulky into second. If that frees up then I guess the gearbox will be starting to get a bit worn worn.
I had the oil replaced with AmsOil synthetic and 50,000 miles later the gearbox is still working and still a bit baulky into second. If that frees up then I guess the gearbox will be starting to get a bit worn worn.
DarkMatter said:
Having searched the Griffith and Chimaera forums I see that '350matt' advocates the use of Castrol SMX-S gearbox oil in the T5 gearbox...
I `ve always used the castrol smx-s, much better than the atf rubbish, keep that stuff for powered steering and auto boxes that it was designed for.350Matt said:
...Castrol's SMX-S gearbox oil is far better for the box, gives superior shift quality and you're much less likely to seize 5th on its shaft ( no real bearing under the gear just relies on oil film).
I know its says ATF on the box however at a previous job involving the T5 gearbox I was told by the head of Tremec's R & D dept that the only reason they spec'd ATF was cost, as a gearbox oil its rubbish.
I'm wondering who else is using something other than ATF in their T5 gearbox?I know its says ATF on the box however at a previous job involving the T5 gearbox I was told by the head of Tremec's R & D dept that the only reason they spec'd ATF was cost, as a gearbox oil its rubbish.
Pupp said:
Pupp said:
Have been oking into this recently and have seen more than one commentary where it is suggested non-ATFs, and particularly synthetics, will damage composite blocker rings in T5s. Any views/experience?
No-one interested in this then?B.
Slow M said:
Oil is rated for the materials (metallurgy and composites) used in the driveline. Bronze also requires particular oils not to degrade, some are actually corrosive. Some "modern" oils that the parts counter idiots tout as "better" are not suited for older boxes with bronze components. Look at TYPE. I think Type IV is good for me, and Type V is good for people who like plastic bits in their gearbox. You must make the correct selection for the components.
B.
On that label you posted it appears that GM synchromesh fluid p/n 12345349 is recommended (am I right in thinking that this is NOT an ATF, and not synthetic?) but that Dextron II ATF is an alternative?B.
From the responses to my question it looks like fully synthetic manual transmission fluid is popular with a lot of people.
Redline MTL claims to be a popular replacement and improvement over GM synchromesh fluid p/n 12345349 and also is safe for brass synchro's
DarkMatter said:
On that label you posted it appears that GM synchromesh fluid p/n 12345349 is recommended (am I right in thinking that this is NOT an ATF, and not synthetic?) but that Dextron II ATF is an alternative?
From the responses to my question it looks like fully synthetic manual transmission fluid is popular with a lot of people.
Redline MTL claims to be a popular replacement and improvement over GM synchromesh fluid p/n 12345349 and also is safe for brass synchro's
Dark, From the responses to my question it looks like fully synthetic manual transmission fluid is popular with a lot of people.
Redline MTL claims to be a popular replacement and improvement over GM synchromesh fluid p/n 12345349 and also is safe for brass synchro's
Should have mentioned that this sheet came with my TK3550. If I were to try something other than this, I'd contact Tremec's tech department.
B.
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