checking transmision fluid properly
checking transmision fluid properly
The manual says 2 ways to check auto trans fluid- Yes warm & running but - it illustrates unbolting the tube and sliding it away from engine to check level and another illustration shows just to check where it is- - HELP?
1996 XJR6 supercharged
i do feel a bump into gear sometimes while driving back road
1996 XJR6 supercharged
i do feel a bump into gear sometimes while driving back road
Veteran Member
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From: Pacific Northwest USA
I've not heard of the '...unbolting the tube...' thing.
Trans fluid expands quite a bit with heat which can confound the measuring. I prefer to check the level when HOT, not warm. A ten mile drive does the trick. With trans in "P" and engine running, car level, pull the stick, wipe it, reinsert, and pull it again. Add fluid if needed. That's it.
Because of the expansion thing transmission dipsticks, including yours, typically have a 'safe range' as well as Min and Max markings.....or similar nomenclature. However, I saw a TSB suggesting the fluid be topped off right to the full mark on the XJRs and V12s. I don't recall the rationale, if it was even stated.
Cheers
DD
Trans fluid expands quite a bit with heat which can confound the measuring. I prefer to check the level when HOT, not warm. A ten mile drive does the trick. With trans in "P" and engine running, car level, pull the stick, wipe it, reinsert, and pull it again. Add fluid if needed. That's it.
Because of the expansion thing transmission dipsticks, including yours, typically have a 'safe range' as well as Min and Max markings.....or similar nomenclature. However, I saw a TSB suggesting the fluid be topped off right to the full mark on the XJRs and V12s. I don't recall the rationale, if it was even stated.
Cheers
DD
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Joined: Apr 2017
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From: Kansas City USA
Since you have the Supercharged engine you have a different transmission then the other normally aspirated engine with the ZF4HP24 .
Yours is the GM transmission 4L80E
https://www.google.com/search?q=jagu...AkQrQIIMSgEMAA
Yours is the GM transmission 4L80E
https://www.google.com/search?q=jagu...AkQrQIIMSgEMAA
Last edited by Lady Penelope; Nov 26, 2017 at 02:17 PM.
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From: Sanford, NC
The manual says to loosen the bolt that mounts the transmission dipstick tube then slide it away to check the fluid level, which incidentally is right on the EGR exhaust manifold.... so it will be hot as Hades.
I always thought it was an odd procedure, but assumed it had to do with the routing of the tube and potential binding of the stick when removing and reinserting? But if that's the case, why even tighten it in its "stowed position" so that is up against the manifold? Who knows.... just seems strange. It only moves about an inch at most. Heck I wonder what the downside would be to just leave it away from the manifold permanently?
But yep, the XJR transmission is a GM 4L80E
.
I always thought it was an odd procedure, but assumed it had to do with the routing of the tube and potential binding of the stick when removing and reinserting? But if that's the case, why even tighten it in its "stowed position" so that is up against the manifold? Who knows.... just seems strange. It only moves about an inch at most. Heck I wonder what the downside would be to just leave it away from the manifold permanently?
But yep, the XJR transmission is a GM 4L80E
.
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Joined: Apr 2017
Posts: 4,039
Likes: 1,397
From: Kansas City USA
See link below concerning your GM 4L80E transmission :
https://www.jaguarforums.com/forum/x...begins-189715/
https://www.jaguarforums.com/forum/x...begins-189715/
Last edited by Lady Penelope; Nov 26, 2017 at 03:46 PM.