Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Kountry Life
Ford Tractors Discussion Forum

Ford 750/755 rebuild, tranny questions

Welcome Guest, Log in or Register
Author  [Modern View]

11-25-2015 21:05:54

Report to Moderator

Hi all,

I have a 750 TLB that I've been resurrecting, and right now I have the motor out for a sleeve job (it's got a cylinder wall cavitation pinhole).

My question is this: what if anything should I do to the torque converter and/or tranny while the engine is out?

It's hard to say since I don't have anything to gauge it against, but it seemed like I wasn't get much power to the wheels, certainly not as much as the engine seemed to be making. 1st and 2nd gear work, and 3rd is almost useless except on flat pavement or downhill. Uphill in 1st, on say a 20-25% grade, with the engine rev'd pretty high it moves but it's very slow. It digs alright though.

I'm not very familiar with automatic transmissions per se, but what if anything could be going on? Is the torque converter not transmitting power to the tranny? My understanding is that the transmission shifts by having various hydraulically actuated clutches "grab" the appropriate gear, and since the thing shifts okay, is that all it needs to do, or do these clutches somehow slip too?

I've filled the hydraulic oil reservoir and changed the filter.



[Log in to Reply]   [No Email]

12-10-2015 00:23:52

Report to Moderator
 Re: Ford 750/755 rebuild, tranny questions in reply to 750owner, 11-25-2015 21:05:54  
4) Also, what about the "transmission dump"? Could that somehow be engaged and causing power loss? I admittedly don't know what it does.

[Log in to Reply]  [No Email]

12-09-2015 20:27:47

Report to Moderator
 Re: Ford 750/755 rebuild, tranny questions in reply to 750owner, 11-25-2015 21:05:54  
Hi All,
Thanks for the input.

It's actually a 3 speed with fwd/rev clutch pack.

I have zero experience with these tranny's, though I do have the service manual (which isn't too helpful on the troubleshooting), but a few possibly dumb questions:

1) The machine does shift into the various gears and fwd/rev. I understand there are hydraulically actuated clutch packs that select the gears, but can they indeed slip enough to lose a lot of power? I had figured engaged was engaged.

2) To that end, it appears there is a pressure regulator on the transmission pump which I am told can be adjusted. Is this something to look at, or are there wearable parts in the clutch packs that might need replacing?

3) Can the torque converter actually significantly wear out? i.e. can the fluid significantly wear down the vanes? It sounds that way. I have no idea what the normal service life ought to be, or what the rate of performance deterioration is.

Thanks again!

[Log in to Reply]  [No Email]

11-26-2015 10:58:17

Report to Moderator
 Re: Ford 750/755 rebuild, tranny questions in reply to 750owner, 11-25-2015 21:05:54  
Could be slipping clutches or a worn torque converter. A pressure test on the tranny would have been nice before the engine came out.

Torque converters can be evaluated for wear by an end play test of the internals. Most any transmission shop should be able to do this for you, as it takes a special tool to measure it with any accuracy.

[Log in to Reply]  [No Email]

11-26-2015 07:18:07

Report to Moderator
 Re: Ford 750/755 rebuild, tranny questions in reply to 750owner, 11-25-2015 21:05:54  
It sounds like you have a four speed power reversing transmission. Get yourself a manual, a lot of parts for that reverser are no longer available. Make sure you added the correct oil if it was the oil and filter you changed in the reverser, the wrong oil will wipe out the reverser quickly. I have a 655A with that transmission.

[Log in to Reply]  [No Email]

11-26-2015 03:33:06

Report to Moderator
 Re: Ford 750/755 rebuild, tranny questions in reply to 750owner, 11-25-2015 21:05:54  
I think there are adjustments to be made on the clutches but I've never worked on one. You may have to get a shop manual to adjust them properly or find a mechanic that is familiar with them to help or give you pointers.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums

Today's Featured Article - Product Review: Electronic Ignition - by Staff. Oil, for example has come a long way in the last 50 years and I don't use anything but the latest API grade available. I've heard the arguments for non-detergent oils but would never trade it for today's formulations. Paint is another, the modern acrylic enamels are great for resistance to grease and fuel stains, retaining their shine and they last forever; unlike enamels and lacquers . Still another is the alternator. No doubt using the original generator keeps the tractor pure, but for thos ... [Read Article]

Latest Ad: Armstrong 11.2x24 4 ply new never run,mounted on Allis B or C rim [More Ads]

Copyright © 1997-2021 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy