Hey Yall. Ok I have a 89 f150 4x4 300-6 with a 4 speed. I have a 5 speed out of a 94 f150 4x4 300-6 and both drive shafts and the crossmember. I hate to take my 4 speed out but with fuel prices and what not the overdrive would be a nice help.
So what kind of problem will i run into? anyone done this and have some pointers? The 5 speed has the hydraulic throwout bearing and my 4 speed has the external slave cylinder. Is there going to be a problem with that?
thanks for the help..

 

You will need a new clutch hydraulic line and a new slave cylinder (Ford Motorcraft will last the longest) for an '89 5-speed F150. The clutch master cylinder will work fine as long as you use a slave cylinder for an '89 - the '94 slave cylinder will not work with the '89 master. You might also need to get the transmission tunnel cover for the cab floor. I don't know if they had a common design in '89, but the original 4-speed tunnel cover did not fit with the 5-speed I installed in my '87.

 

ok I already got a clutch kit for the 94 five spped that has the clutch pressure plate slave cylinder and what not.. It may be a stupid question but why wont the the 89 master work? does it have a longer stroke or what? the ends look the say on the hose lines. But im not real sure this is the first rig Ive messed with that has a hydraulic clutch. lol.

 

The master cylinder piston diameter changed in '93 I believe. The clutch and pressure plate should work fine, though.

 

ok. thanks for the help. does the position of the cross member change (mount farther back)?

 

It did on my truck between the 4-speed cross member and the 5-speed. I had to go back to the junkyard and get the angled support brackets that go between the cross member and the top of the frame rails, but nothing required any drilling in the frame.

 

ok thanks.. i was hoping this would be a little bit easier project but this still dont sound that bad and it should be worth it..

 

also how do i know what 5 speed i have? from what ive seen there is 2 types.

 

Since your 5 speed is out of another F150, it will be the lighter duty M5OD Mazda tranny, and good word of advice, don't abuse...to much.



And, before installing it in the truck, replace the 3 rubber plugs up on the shift tower, they leak as you drive, run the tranny dry and burn it up, alot of these trannys died because of this!

I think Ford sells the copper plugs to replace the crappy rubber ones!


Heres what i'm talking about if your not sure. They are accessible from removing the floor hump inside the truck, but since the tranny is out, do it now.

 

ok. thanks. is that what they call the zf or... if i had the money i'd just keep my 4 speed and get a ranger overdrive unit to add to it. after i kill the 5 speed (probally in a couple years of hard trailer hauling and just normal abuse) i plan on going back to the 4 speed with the ranger o/d. so if anyones done this and has any pointer thatd be nice too.

 

The 5 speed you have is the M5OD, if you want a ZF5, those are the heavy duty trannys found only in F250'sHD or F350's.

 

ok thanks.

 

ok ive done alot of looking around and cant find those plugs.. do you know a part # or something? thank

 

Don't expect much in the way of mileage improvement. The power required to move your truck down the road will not change and it takes gas to make power. Your best bet for mileage improvement is to slow down. Drive a light, aerodynamic vehicle when possible. Trucks are for hauling loads and towing.

 

Couple months ago I seen a post about those plugs. Someone found a steel plug that fit in the M5OD shift rail holes. Got to do some searching on "M5OD plugs" or something to that.