Sychronizer or Clutch??

Reply Subscribe

Thread Tools

Search this Thread

Aug 18, 2004 | 04:23 PM

IdahoCowboy

Thread Starter

New User

Joined: Aug 2004

Posts: 18

Likes: 0

Sychronizer or Clutch??

Ok I have a 85 F-150 with a inline 6 when I start it up first thing in the morning it will go into all gears fine even reverse but after it is driven enough to warm up it gets hard to get into gear and sometimes I have to work it through all the gears before it will go into reverse. My second problem is that I am only getting 10 miles to the gallon!!! Is that normal?? Thanks for any thoughts

JP

Aug 18, 2004 | 04:52 PM

87 XLT

Postmaster

Joined: Oct 2003

Posts: 4,516

Likes: 1

From: SoCal

I'm guessing your trans takes gear oil, i'd switch to synthetic & see if that helps.

Aug 18, 2004 | 06:07 PM

bremen242

Logistics Pro

Joined: Jan 2002

Posts: 3,739

Likes: 3

From: GANS

Quote:

Originally Posted by IdahoCowboy

I doubt it is the tranny itself. I think the problem is with either your slave/master cylinder for the clutch, or the clutch springs themselves. How many miles does your clutch have on it?

If it is over 100k, you should probably get a new clutch. Does it grind when you shift into reverse when you are have the trouble? My springs/throwout bearing was worn enough that it wouldn't disengage the clutch enough and it was hard to get it gear when you were sitting still.

Aug 18, 2004 | 06:15 PM

87 XLT

Postmaster

Joined: Oct 2003

Posts: 4,516

Likes: 1

From: SoCal

Good point, I wonder if the freeplay in the clutch pedal is somehow increasing as the truck warms up?? Should only be about an inch at all times.

Aug 18, 2004 | 06:24 PM

bremen242

Logistics Pro

Joined: Jan 2002

Posts: 3,739

Likes: 3

From: GANS

Quote:

Originally Posted by 87 XLT

Good point, I wonder if the freeplay in the clutch pedal is somehow increasing as the truck warms up?? Should only be about an inch at all times.

I think the springs get weaker when they are hotter, and they don't push on the pressure plate hard enough..

or the slave is leaking..

Aug 18, 2004 | 08:51 PM

Charles in AZ

Junior User

Joined: Jan 2004

Posts: 56

Likes: 0

From: Southern Arizona

I have seen Ford transmissions behave like this when the gear lube is low. I am sure you have checked but just thought I'd mention it. I don't think it is the clutch; you would be grinding into first and reverse if the clutch wasn't releasing all the way and you didn't mention grinding. I would start by draining and refilling the transmission with good 90-weight hypoid lube. Check the oil that you drain for fine metal particles; I suspect that you may have cluster shaft bearings or output shaft pilot bearings on the way out. Cold gear oil will hide the problem but when the oil thins with heat then you could be getting some internal misalignment causing the shifting problems.
Incidentally, 10 mpg is horrible for your rig. I have an 83 F-150, 4wd, I-6 and I routinely get 18 mpg on the highway.

Aug 19, 2004 | 05:55 AM

bremen242

Logistics Pro

Joined: Jan 2002

Posts: 3,739

Likes: 3

From: GANS

probably wouldnt hurt.. He might only be grinding into reverse if it is a toploader OD..

10mpg is pretty common for EEC-IV when it is in limp mode, and virtually all EEC-IV 300-6s i've seen are in limp mode (or technically "open loop mode"). You are lucky to have an '83 when the good old duraspark system

Trending Topics

1985 F250 4.9 i6 Fuel Pump Replace

82

1.1k
7.3 or/vs 6.7

75

3.7k
Fords V8 gas competition

24

856
BWST's F350 maintenance/upgrade thread

2.1k

160.4k
Alternator Wiring

17

169

Aug 20, 2004 | 08:14 PM

IdahoCowboy

Thread Starter

New User

Joined: Aug 2004

Posts: 18

Likes: 0

Sorry guys I haven't checked in in a day or so. I did forget to mention it will grind going into first sometimes and if I drive it awhile it will even get hard to take out of gear to downshift or upshift. I have checked and changed the tranny oil. the old stuff looked like it was the original. It came out white and with almost no viscocity. When I bought the truck I was told the clutch was fairly new, How true that statement is I can't really say. I did get under it one day and pull off the dust cover on the tranny where the clutch is and I found that the lever that goes into the clutch I guess to disengage it felt a little loose I messed around with and it made a difference for about 10 miles and that was that. I tryed again and didn't get any result.. As for the EEC-IV how can I clear it out of Limp mode. I have diesel trucks and I am not to familiar with the ford gasoline system so any help wonderful. Thanks again guys and I'll try and check back in sooner.
JP