4.9 np435/t18 swap - Ford Truck Enthusiasts Forums

Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

4.9 np435/t18 swap

 
  #1  
Old 05-07-2012, 06:03 PM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
4.9 np435/t18 swap

hey guys i have a 1986 f150 4x4 with the old 300 and im trying to plan all this out before i buy the trans. i have a few questions about this whole swap.

1)is the spline the same between a tremec rts and say a np435 or t18?

2)when swapping from the tremec to the t18 or np435 will i have to mess with a new transmission crossmember?

3) my truck is a 4x4 so between the transmission and the transfer case will i need to bother with the length of my driveshaft?

if anybody has any input to my cause it would be appreciated
thanks
 
  #2  
Old 05-07-2012, 11:03 PM
Gary Lewis's Avatar
Gary Lewis
Gary Lewis is offline
Posting Legend
Join Date: Jul 2010
Location: Northeast, OK
Posts: 32,866
Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.
Let me make sure - you have a Tremec?
 
  #3  
Old 05-08-2012, 05:20 AM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
yes i have a tremec rts 3 speed with overdrive. would i be able to use the same bell housing for both?

are the clutches splined the same?
 
  #4  
Old 05-08-2012, 08:06 AM
Gary Lewis's Avatar
Gary Lewis
Gary Lewis is offline
Posting Legend
Join Date: Jul 2010
Location: Northeast, OK
Posts: 32,866
Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.
I can't answer that question. I wasn't aware a Tremec RTS was ever used in these trucks. The Ford Master Parts Catalog lists the following as the only manual transmissions up through '86: 3-speed; SROD; NP435; T18: T19.

Has that tranny been swapped in?
 
  #5  
Old 05-08-2012, 09:43 AM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
not it is the stock tranny
 
  #6  
Old 05-08-2012, 09:47 AM
Gary Lewis's Avatar
Gary Lewis
Gary Lewis is offline
Posting Legend
Join Date: Jul 2010
Location: Northeast, OK
Posts: 32,866
Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.
So, I can't answer your question. I have no clue what the shaft size and spline count is. You should have told us it wasn't stock to start with.
 
  #7  
Old 05-08-2012, 09:58 AM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
i am almost positive that the tremec rts was in the 1980-86 f150s
 
  #8  
Old 05-08-2012, 10:57 AM
ctubutis's Avatar
ctubutis
ctubutis is offline
Moderator
Join Date: Nov 2007
Location: Denver Metro Area, CO
Posts: 21,537
ctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputation
Originally Posted by camo86 View Post
i am almost positive that the tremec rts was in the 1980-86 f150s
Gary,

The Tremec also goes by the name of Clark and may even be referred to as the RAT/RUG, I really don't know for certain as we don't see it out here real often. Ralph knows a lot about it and could maybe explain if he were to stop by.

In any event, my understanding is that the 4-bolt bell housing pattern will accept any manual transmission used in this era, the spline count is the same all around (keeps Ford from having to use different crankshafts for different transmissions).

The parts catalog says the tranny mount crossmember is the same 1985/87 4WD pickups & Broncos although it wouldn't surprise me if its location needed to be adjusted and the driveshaft needed to be changed to accommodate it.

Camo.... Not trying to be an *** or anything, but I think one of the reasons why you're getting so little response is because it's hard to figure out what you're trying to say.

For example:
Originally Posted by camo86 View Post
not it is the stock tranny
Not..... Not what? You're negating something but I have no idea what.

Capitalization & punctuation & correct grammar go a long ways towards asking for help on the Internet, and this place is certainly no exception. Gary is one of the most helpful guys here, but even he won't be much help if he can't figure out what you're trying to say.

Just sayin'....
 
  #9  
Old 05-08-2012, 11:11 AM
82f100460's Avatar
82f100460
82f100460 is offline
Posting Guru
Join Date: Jan 2012
Location: Dallas, GA
Posts: 1,410
82f100460 is gaining momentum as a positive member of FTE.82f100460 is gaining momentum as a positive member of FTE.
From what i've read...you may be referring to either the RTS or RUG. The RTS, I think commonly referred to as an SROD and the RUG being a top loader type.

In the article I read, they were manufactured by Tremec, but not marketed as a Tremec transmission...simply assembled by them.

You will need to get a transmission code or something before you'll ever know for certain what you have.
 
  #10  
Old 05-08-2012, 11:18 AM
82f100460's Avatar
82f100460
82f100460 is offline
Posting Guru
Join Date: Jan 2012
Location: Dallas, GA
Posts: 1,410
82f100460 is gaining momentum as a positive member of FTE.82f100460 is gaining momentum as a positive member of FTE.
Camo....as an FYI, all the information I've been able to find to help you, I found on Google. You need to try to find some of this on your own please.

We all love to help but you need to help yourself a little first. All I had to do is google ford f150 tremec and found out what I posted above.

Like Chris stated above...if you go to the Tremec web site, you won't find this transmission. It was contracted out by Clark to tremec of Mexico for assembly. So all the literature will be found under Clark....Including the Ford Master Parts Catalog
 
  #11  
Old 05-08-2012, 12:02 PM
Gary Lewis's Avatar
Gary Lewis
Gary Lewis is offline
Posting Legend
Join Date: Jul 2010
Location: Northeast, OK
Posts: 32,866
Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.Gary Lewis has a spectacular reputation.
Ok, my mistake. Learn something everyday, and hopefully several things today. Thanks, guys, for setting the record straight.
 
  #12  
Old 05-08-2012, 02:24 PM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
sorry guys i'll look around on my own research and get back to you with some better questions.

thanks anyways
 
  #13  
Old 05-08-2012, 05:03 PM
trumsey07
trumsey07 is offline
Senior User
Join Date: Apr 2011
Posts: 136
trumsey07 is starting off with a positive reputation.
dont give up on it, i did this same swap last year on my 86 f150 4.9, 4x4 with the 3sp overdrive. the t18 will bolt up to your motor just fine. the cross member will work good for the t18 and your drive shaft is fine as long as you use your current tcase and tail shaft adapter. hope this helps you out
 
  #14  
Old 05-08-2012, 06:39 PM
camo86
camo86 is offline
Freshman User
Thread Starter
Join Date: Apr 2012
Posts: 39
camo86 is starting off with a positive reputation.
does the transfer case off the 3 spd with overdrive bolt right up to the t18?
 
  #15  
Old 05-08-2012, 06:44 PM
ctubutis's Avatar
ctubutis
ctubutis is offline
Moderator
Join Date: Nov 2007
Location: Denver Metro Area, CO
Posts: 21,537
ctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputation
Any transfer case should bolt to any 4WD transmission.

I forget the two transfer cases used - BW1345 and an NP variant, I think.
 

Thread Tools
Search this Thread
Quick Reply: 4.9 np435/t18 swap


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.