Hi everyone i got a 1993 f150 XL my cluch is going out
i have a 4.9L I6 with VERY high gearing in the trans
i do some towing of heavy loads Once in a a blue moon
witch is very hard on the clutch is it worth puting in a heavy duty clutch for $240.00 or a standerd for $154.00

thanks for reading and info

anybody know the rearend ratio for this truck?
I think this is my trans

Model: M5OD-R2
Type: Five speed Mazda Overdrive
Years: 88-96 Bronco, F150s
..........97-03 F150s
..........05 F150 (v6)
Engines: 300, 302, 4.2L, 4.6L
Fluid: Mercon
Display:
1.3.(D)
2.4.R
Ratios:
1st 3.90:1
2nd 2.25:1
3rd 1.46:1
4th 1.00:1
5th 0.80:1
Construction features: External Ribs in square patterns
Trans code: M

 

What is the axle and trans codes on the door sticker?

A heavy duty clutch can help a lot, but do the job right, remove the flywheel, send it out to be precision ground, and get a complete clutch kit. Otherwise that HD clutch will chatter like crazy, I'm speaking from personal experience here.

 

The Mazda isn't a towing trans, so you need to keep up with the maintenance on it, or it'll die. If it goes, you should look for a ZF (very HD with OD & granny) or an NP435 (very HD w/granny) or a BW T-18/19 (HD w/granny).

If you want to make it last a little longer, get numerically higher rear gears. I have the NP435, so my truck tows fine with 3.08s & 32s.

 

thanks for info

you said send flywheel out to be precision ground
I own a machine shop w/a 24X72 Lathe can i do it myself?
what do i got to do / look out for?








BRICE LITTLE

 

I don't know - normally, you use a flywheel grinder. I think the going price to have it done is about 35 bucks. Here's a picture of one if that helps:

http://www.gearcentregroup.com/flywheel.html

The guy that put my Brute Power clutch in ground it in place with a hand grinder - the way that clutch chatters, I don't think he got it right. It can't be totally true.

 

I don't think you can lathe a flywheel true. It takes a high-speed grinder on a table like that link shows.

 

Why can't you turn a flywheel? So long as it is flat with a good finish it'll work. The reason they're usually ground now is for consistency and grinders are more available now. They also often have magnetic chucks, which make it easier to fixture and dial in. But, if you take it to the local auto parts store they'll turn it.

 

Because it pushes too hard against the flywheel for it to end up perfectly true. The grinder barely touches it.

 

I'm not sure what you mean. He's just doing one flywheel, so if he spends a few minutes dialing it in and takes a light finish pass with say a sharp carbide insert with a 16ht or 32nd radius, he should easily be able to get it flat better than 5 tenths. I'll admit that the grinder would be even better, probably a tenth or better, but a turned one will still work fine.

 

The hub of the flywheel is designed to be slightly flexible, so you'd need a HUGE lathe adapter to hold it rigidly. If you think it'll work, give it a shot - I'd just run it over to a shop that has the special grinder, pay them ~$30, & put it back together.