Cold blooded 4 Spd
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 167
Likes: 0
From: Topeka, Kansas
Cold blooded 4 Spd
I am having a hard time downshifting into 2nd when the tranny is cold (40 degrees or below) Sometimes I have to come to a complete stop and start in granny gear to get going. Someone said I could run atf fluid instead of gear oil to remedy my problem. Will that work and would that damage my seals?
Senior User
Joined: Jan 2008
Posts: 273
Likes: 1
Originally Posted by Mrcorey5
I am having a hard time downshifting into 2nd when the tranny is cold (40 degrees or below) Sometimes I have to come to a complete stop and start in granny gear to get going. Someone said I could run atf fluid instead of gear oil to remedy my problem. Will that work and would that damage my seals?
Freshman User
Joined: Jan 2008
Posts: 30
Likes: 0
i read somewhere but cant remember where (maybe the owners manual), that in cold climates there was an alternative lubricant that was supposed to be used. it might of been 10w30 or something, i cant remember. but if you ever seen 90w gear oil at 40degrees, youll understand why it wont shift until the oil and gears are warm. usually a few miles of diving and the oil comes up to a high enough temp for it to shift regular. if you have a owners manual, im certain it adresses cold climate procedures
Last edited by udontknowme; Jan 16, 2008 at 08:30 PM.
Senior User
Joined: Apr 2005
Posts: 446
Likes: 1
From: South Bend, IN
Ford's original recommendation for the NP435 was 50W oil in the summer and 30 in the winter. 20W-50 motor oil is readily available and matches those viscosities pretty closely, that's what I use and my tranny shifts fine in the cold. 80-90 gear oil is just too heavy.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Ford said to use engine oil not gear oil when the NP435 came out. 50w for summer and 30w for winter. Instead I use royal purple syncromax fluid.
Trending Topics
Logistics Pro
Joined: Aug 2003
Posts: 4,701
Likes: 6
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Postmaster
Joined: Aug 2000
Posts: 3,312
Likes: 1
From: Eldorado Ca. USA
Originally Posted by teds74ford
I am running valvoline vr1 sae 50 in mine with now problems.
Postmaster
Joined: Aug 2000
Posts: 3,312
Likes: 1
From: Eldorado Ca. USA
Originally Posted by teds74ford
I am running valvoline vr1 sae 50 in mine with now problems.
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 167
Likes: 0
From: Topeka, Kansas
Royal Purple
I did switch out my tranny and tranfer to 30w royal purple($45) It cured the problem instantly - plus going from 2wd to 4wd can be done with 1 finger! It took about 20 miles to feel the total change but now I don't have any worries about breaking the shifer linkage. It feels like shifting a new truck! Thanks a million for the tips and repies, you guys are great!
Laughing Gas
Joined: Feb 2007
Posts: 821
Likes: 0
From: hohenwald, tn
i changed the fluid in my np when i got the truck the beginning of the year. i did the stupid and put 80w90 in and it was hard to shift. the truck should be running tommorrow as i changed to correct 50w, replaced a the output seal, fixed the leaking pto, changed to a 4bbl, fixed engine oil leaks and put a dist pickup in.
Logistics Pro
Joined: Aug 2003
Posts: 4,701
Likes: 6
Originally Posted by masterbeavis
That is some expensive stuff, but it does have a high zinc content to protect against metal to metal wear.