Np-435
Thread Starter
|
Senior User
Joined: Aug 2005
Posts: 183
Likes: 1
Np-435
I have an 86 ford f-150 with np-435 transmission. The truck pops out of third gear, even if you hold it in making third gear pretty much un-usable. I posted on this before and i was told that towing the truck can do this as stated in the article below:
http://www.novak-adapt.com/knowledge/np435.htm
What i need to know, if this is the case, is it worth trying to rebuild and fix the transmission if it is fixable. Or should i just keep my eye out for an np-435. Im pretty sure i can get an np-435 for under 100 as i have found a private junkyard with a bunch of 80's ford. What would you do, and is my third gear fixable or forever gone?
http://www.novak-adapt.com/knowledge/np435.htm
What i need to know, if this is the case, is it worth trying to rebuild and fix the transmission if it is fixable. Or should i just keep my eye out for an np-435. Im pretty sure i can get an np-435 for under 100 as i have found a private junkyard with a bunch of 80's ford. What would you do, and is my third gear fixable or forever gone?
Postmaster
Joined: Feb 2003
Posts: 3,441
Likes: 5
From: Muskegon, MI (home)
I picked up a complete rebuild kit for my NP435 for $165 from Bronco Graveyard...it came with everything but new gears: bearings, bushings, seals, gaskets, thrust washers, syncro rings, everything to make the ol gear jammer shift like new. Like everyone else said... takes a good part of a weekend to get the job done. Good luck!
Post Fiend
Joined: Mar 2004
Posts: 24,418
Likes: 3
From: San Francisco, Ca.
Originally Posted by Pkupman82
I picked up a complete rebuild kit for my NP435 for $165 from Bronco Graveyard...it came with everything but new gears: bearings, bushings, seals, gaskets, thrust washers, syncro rings, everything to make the ol gear jammer shift like new. Like everyone else said... takes a good part of a weekend to get the job done. Good luck!
Were there any special tools you needed to buy/rent/borrow?
Trending Topics
More Turbo
Joined: May 2002
Posts: 594
Likes: 5
From: Wetumpka, Alabama
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Postmaster
Joined: Feb 2003
Posts: 3,441
Likes: 5
From: Muskegon, MI (home)
The rebuild wasn't too difficult, just make sure you have a nice clean, well lit workbench or table to lay all the parts on. Just lay everything out in order as you take it apart, take your time and look at what comes in your rebuild kit, and make sure you have everything you need. Just take it one step at a time and you'll do fine. These old 4 speeds are really pretty simple to work on. I cannot recall needing any special tools, I recommend having a plastic/rubber dead blow hammer and a couple different sized brass punches on hand.
Thread Starter
|
Senior User
Joined: Aug 2005
Posts: 183
Likes: 1
Im not so much worried about doing the rebuild my self but what worries me is in the article on the site:
http://www.novak-adapt.com/knowledge/np435.htm
it says "Improperly towing any vehicle with the NP435 transmission can cause the very prompt destruction of third gear bore and its mainshaft journal due to insufficient oiling." which i don't know if the third gear bore and its mainshaft journal can be repaired with just a "normal" rebuild kit? Does anyone know or can give me any more information on this? thanks for all the responses so far
http://www.novak-adapt.com/knowledge/np435.htm
it says "Improperly towing any vehicle with the NP435 transmission can cause the very prompt destruction of third gear bore and its mainshaft journal due to insufficient oiling." which i don't know if the third gear bore and its mainshaft journal can be repaired with just a "normal" rebuild kit? Does anyone know or can give me any more information on this? thanks for all the responses so far
Senior User
Joined: Dec 2005
Posts: 301
Likes: 0
A Cautionary Issue on Towing
Improperly towing any vehicle with the NP435 transmission can cause the very prompt destruction of third gear bore and its mainshaft journal due to insufficient oiling.
If you must flat tow, and have a transfer case, you may set it in full neutral and place the NP435 in any gear to prevent mainshaft spin. However, note that many transfer cases themselves do not allow for flat towing.
Preferably, you may wish to disconnect the rear drive shaft. Rear axle lockout hubs may be a worthwhile addition for this reason.
We have seen and heard of a few incidents of this over the years, the worst of which producing a complete friction welding of third gear to its mainshaft.
This is one of the only quirks of the 435, and easily avoidable.
They mean haveing this vehicle towed not towing with it.
Improperly towing any vehicle with the NP435 transmission can cause the very prompt destruction of third gear bore and its mainshaft journal due to insufficient oiling.
If you must flat tow, and have a transfer case, you may set it in full neutral and place the NP435 in any gear to prevent mainshaft spin. However, note that many transfer cases themselves do not allow for flat towing.
Preferably, you may wish to disconnect the rear drive shaft. Rear axle lockout hubs may be a worthwhile addition for this reason.
We have seen and heard of a few incidents of this over the years, the worst of which producing a complete friction welding of third gear to its mainshaft.
This is one of the only quirks of the 435, and easily avoidable.
They mean haveing this vehicle towed not towing with it.
Thread
Thread Starter
Forum
Replies
Last Post
Coastal68
1967 - 1972 F-100 & Larger F-Series Trucks
8
Jun 24, 2016 12:52 PM
yellow truck
1967 - 1972 F-100 & Larger F-Series Trucks
19
Feb 6, 2015 09:03 AM
KIKKUP
1973 - 1979 F-100 & Larger F-Series Trucks
22
Aug 31, 2014 04:41 PM
