Hard to Shift when Cold
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Joined: Jun 2013
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Hard to Shift when Cold
My truck is a 1981 F150 Ranger with an in-line six motor and granny gear transmission (not original).
When the weather is cold (below 40, in Florida), it's difficult to shift. Once the truck is warmed-up, it's OK.
Should I change the transmission oil? With what type?
Thanks,
Oldforddy
When the weather is cold (below 40, in Florida), it's difficult to shift. Once the truck is warmed-up, it's OK.
Should I change the transmission oil? With what type?
Thanks,
Oldforddy
Tuned
Joined: May 2013
Posts: 396
Likes: 5
From: Ottawa, Canada
I live in Canada. On days down to -20C or -30C (-4 to -22F) I find it takes like a second and a half with decent force to move the shifter from 1st to 2nd on my np435. It can be real slow in the cold. I'm running 80w90 and its still like molasses. I wouldn't worry about it really I've never had any issues over a few winters.
Cargo Master
Joined: Aug 2007
Posts: 2,561
Likes: 69
From: New Zealand
And GL4, not GL5.
GL5 is more 'slippery' which is good for bearing & gear life..........but that same characteristic causes shifting to be harder than with a GL4 oil.
This is because the synchro rings need friction to operate, & is a recognized issue.
GL5 is more 'slippery' which is good for bearing & gear life..........but that same characteristic causes shifting to be harder than with a GL4 oil.
This is because the synchro rings need friction to operate, & is a recognized issue.
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