cockeyedMFer
Gold Member
- Joined
- Jul 25, 2011
- Messages
- 264
- Tractor
- 1959 MF 35 deluxe, gas
Quick note about the Mazda 5 speeds in case anyone is interested - they were used in the F150s and F250s with the 5.0 and 4.9 and as others said, its a light duty trans. The problem area with them is that the slave cylinder is inside the bellhousing and isn't the greatest design.
Any stiffness in the clutch pedal or grinding changing gears can often mean the slave is going bad. Also look for fluid dripping from the bellhousing area. Trans must be removed to change the slave.
The Mazda trans is fine but doesn't have a very steep first gear, and reverse isn't geared enough for backing up with a heavy load and requires a lot of clutch-feathering.
Usually the F250s with the Mazda trans didn't have the heavier rear axle with the large floating hubs, so that's a good visual clue. Also, the stronger ZF trans will have an external clutch slave cylinder. Easy to tell the difference - its a much larger trans too.
I had a few F250s of that vintage and the 4.9 was great - I could get up to 18mpg without the tailgate installed. That was great MPG for a truck back then LOL. It was a much better motor for towing than the 5.0.
One other thing - ford trucks of that era were prone to cracking the aluminum support that holds the clutch pedal. If the pedal just doesn't "feel right" this can be the reason.
Any stiffness in the clutch pedal or grinding changing gears can often mean the slave is going bad. Also look for fluid dripping from the bellhousing area. Trans must be removed to change the slave.
The Mazda trans is fine but doesn't have a very steep first gear, and reverse isn't geared enough for backing up with a heavy load and requires a lot of clutch-feathering.
Usually the F250s with the Mazda trans didn't have the heavier rear axle with the large floating hubs, so that's a good visual clue. Also, the stronger ZF trans will have an external clutch slave cylinder. Easy to tell the difference - its a much larger trans too.
I had a few F250s of that vintage and the 4.9 was great - I could get up to 18mpg without the tailgate installed. That was great MPG for a truck back then LOL. It was a much better motor for towing than the 5.0.
One other thing - ford trucks of that era were prone to cracking the aluminum support that holds the clutch pedal. If the pedal just doesn't "feel right" this can be the reason.