lt77 cold weather, hard to shift - Defender Source
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  #1  
Old December 10th, 2010, 10:15 AM
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lt77 cold weather, hard to shift

So, I have have an LT77 filled with Redline MTL. Now that we have had some cold weather I find it nearly impossible to shift into second until the engine and tranny are heated up. Third can be difficult too. Is there a better fluid for cold temps or is my tranny on the way out?
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  #2  
Old December 10th, 2010, 10:20 AM
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My Haynes manual recommends MTF-94 which you can get from any MINI-Cooper dealership. It has been cold here and I am not having problems...
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Old December 10th, 2010, 10:40 AM
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Likely just the fluid, not the tranny. I've had that happen with every manual transmission I've ever driven when it starts dropping under freezing.
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Old December 10th, 2010, 11:32 AM
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Quote:
Originally Posted by discotdi View Post
So, I have have an LT77 filled with Redline MTL. Now that we have had some cold weather I find it nearly impossible to shift into second until the engine and tranny are heated up. Third can be difficult too. Is there a better fluid for cold temps or is my tranny on the way out?
Redline MTL is in my R380. Same scenario until it gets warm and the tranny was brand new in May.
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Old December 10th, 2010, 11:53 AM
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Todd Miller
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ok thanks for the advice. I guess I will just baby it more.
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  #6  
Old December 10th, 2010, 01:09 PM
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LT77s require ATF type F not dextron or redline
type F has more friction for the syncros
cold temps just make it worse
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Old December 10th, 2010, 01:10 PM
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I have the same problem with mine after a recent fluid change in my LT77. I used regular 80W90 gear oil in everything underneath. Did I use the right thing?

I was told that it would be fine to use ATF in tranny and the problem would go away. Would it be advisable to change to ATF?
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Old December 10th, 2010, 01:15 PM
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Quote:
Originally Posted by Jon_Winningham View Post
LT77s require ATF type F not dextron or redline
type F has more friction for the syncros
To each his own. I have been running MTL in Lt77's with superior results to atf for years as have most everyone I know with Lt77's. In practice it has signifigantly reduced 2nd gear crunch on worn syncro's in transmissions that had been filled with type F.
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  #9  
Old December 10th, 2010, 01:38 PM
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I used Amsoil manual transmission fluid (syncromesh) in my R380 and like it very much. I'm not sure if that helps with the LT77 question though.

http://www.amsoil.com/storefront/mtf.aspx
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Old December 10th, 2010, 02:19 PM
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Try Royal purple's "Synchromax". It got rid of all the erratic/crunching shifting issues I had on the R380's and the LT77's. It seems to put up with the severe temp drops we see here in Wyoming. And for the guy that put 90w in his tranny....good luck with that one! Try flushing it with a couple cycles of cheap ATF and then put the Synchromax in. Good luck!
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