Looking at an older truck for sale. He says he mated an 89F150 5 speed transmission to a 68' mustang 302. ( i think they had 302's in 68..maybe 69)Anyway he said he installed it an a new slave cylinder. What will they take for abuse. Engine (so he says) has 10.5 comp. 650carb, alum. intake, hooker headers 2 1/2 '' exhaust, and a 9" diff. gears unknown. From what i understand the 5 spd's usually have longer ratios. Any an all info would be awesome.
thanks
bill.

 

The 289 uses the same basic block as the 302 so if not 'available' it would bolt right up.
This later became the 5.0L.

I assume you're talking about a ZF 5 speed, which with a small block bellhousing has an internal concentric slave cylinder.
It would be the S-542
They are rated for 420 foot lbs of torque.
Here's a few links; dimensions, exploded view, available ratios and such:
Domestic Truck Tranny Guide
http://www.zf.com/na/content/media/i...2datasheet.pdf
http://www.zf.com/na/content/media/i...2_Exploded.pdf

Hope some of this is what you want.

 

Its most likely the mazda 5 speed, i dont think they put zf 5 speeds in 1/2 ton trucks.
The Mazda trannys are ok, but they arnt really meant for full size trucks.

If for some reason it is a zf, those are beasts. They are built for heavy duty trucks and are much stronger.

Good Luck

 

I had an high mileage 89 f150 with the mazda 5 speed and 302. It held up great on a neglected truck. I have no doubt it will outlast the truck on normal use. The trans was a pleasure to use in conjunction with the 302. You're always one downshift away from the sweet spot on that motor.

I have a zf trans on my 94 f-250 and absolutley hate it. The gear ratios suck with the 3.55. 1st gear is too tall and you have to slip the clutch too much for 2nd. It really feels like your driving a truck. If I had known, I would have got an auto

 

where do these heavy duty 5 speeds exist? I would like to stock pile one for use later on. I have a m5od as far as i know in my 90 302.

 

I have a 89 f150 with the 302 engine and the 5 speed trans which is a mazda e9 ta The rear end has a axil code of 19 which is a 3.55 ratio. My biggest thing which has gone bad is the clutch slave cylinder went out when this happens you have to drop the trans.

 

The Mazda is easy to ID as the case ribs run horizontal as well as verticle. Scroll towards the bottom of this link for a picture.

Domestic Truck Tranny Guide

The number one cause of failure is the rubber plugs at the top rear of the shift tower (necessary to remove the shift rails) dryrot and only leak trans fluid as the vehicle is driven. The leak often goes unoticed until trans failure.

The Mazda ratios in a truck driven for truck purposes is ridiculouse. Top speed in first gear was 27 MPH and reverse was even higher... So backing up a trailer up any kind of incline was hard on the clutch. When comparing towing capabilities of vehicles of the era the Mazda was the weak link and was always rated way lower than any other transmission.

The ZF in 2WD low will allow me to idle a 5000lb cabin cruiser anywhere. At 75 MPH I am turning 2000 rpm with 3.55 gears on 32" tires pullin the same bill board of a load. This trans doesn't like to be speed shifted, but it does what it was designed to do very well. The trans swap saved me from buyin a new truck.