S Type LSD? Lincoln LS Install
#221
#222
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I took a quick look through the SCP messages and the electrical schematics and I believe that the "Powertrain Control Module" is where the coding exists for the gear ratio sensing. It appears that the Wheel speed sensor outputs are linked to the automatic transmission output speed sensor in the PCM. I would guess that there is a coded relationship between the 2 sensors such that if the wheel speed sensor is spinning faster, or slower than the programmed ratio, then a SCP message is generated that puts the car into limp mode. Software would be easy to write to monitor this relationship. Perhaps there is a way to reprogram the ABS/TCCM and/or the DSCCM modules and add a signal converter value, but I think they make these modules as "dumb" as possible so they can use them on different vehicles to keep the cost down. It seems to me that the PCM would be easier to program and monitor this relationship.
Last edited by Tijoe; 02-10-2013 at 10:15 AM. Reason: correct spelling
#223
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#226
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I may have answered my own question. I put 3 pinions next to each other.
3.55 Gen 1 S-type, Mark VIII 3.07 , and a new Ford Racing 3:55 Pinion.
It looks like a S-type pinion would work in a Mark VIII housing, but I'd have to cut off the pilot and use the S-type smaller nut. - I am assuming that the 2.87 Gen 2/STR gears have the same set-up as the Gen 1.
Last edited by Tijoe; 02-10-2013 at 11:11 AM. Reason: spelling
#228
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Regarding programming of the ZF 6HP transmissions, anyone hear of these guys?
ZF6HP Software Repair 1267017177 1267017164 1267017165 1267017169 and Other | eBay
No hit on the internet for this company, but if they can reprogram the TCM module, perhaps this is one solution
ZF6HP Software Repair 1267017177 1267017164 1267017165 1267017169 and Other | eBay
No hit on the internet for this company, but if they can reprogram the TCM module, perhaps this is one solution
The following users liked this post:
Panthro (02-11-2013)
#229
The following users liked this post:
Panthro (02-11-2013)
#230
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#233
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Will the trac-loc fit with enough grinding?
The issue being, too much material is ground-off to maintain integrity of the carrier/housing?
Depending on where the grinding takes place and how much material is removed, is it possible to weld in or box in a reinforcement of some type?
Has DTS pretty much given up on developing a diff solution? Or are they still researching something?
Has anyone contacted a north american distributor for quaife and got a price on their unit for the STR?
#234
#235
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I've been researching online trying to find companies that can reflash our ZF 6HP transmissions. I've found a couple of places in Australia that claim they sell the capability to reflash the shift points and the gear ratio setting. I've sent E-mails trying to find out more. From what I've read, it will most likely cost around $1K for the hardware and software. Not something any one person probably wants to spend that much money on. But perhaps a group of us can afford it.
#236
#237
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Yep, one of them is SCT. I wonder if it would be easier to adjust the differential ratio, without trying to tune shift points. But I suppose that if you change the rear end ratio, one would want to tune the shift points to optimize performance with the new rear gears.
#238
#239
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This thread https://www.jaguarforums.com/forum/general-tech-help-7/change-diff-ratio-ids-sdd-77299/
#240
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I received my second Mark VIII IRS rear end today. I tore it apart, and cleaned the housing. It is boxed up with the first one and they are ready to be shipped off to get the axle seal bores opened up.
I have a plan for an axle set I want to build, but I still have not been able to get each axle out of the 2001 4.0 S-type outer CV joints. I've only had success bending the aluminum based fixture I built. Now I am making a fixture out of 1 x 1-1/2" steel with plans to apply 20 tons.
New donor F150 front half-shafts I purchased, came apart easily using only a slide tube.
Perhaps in the next 2 weeks, we will figure out some more about programming the ZF TCM. It would be fun to swap 3.31 or give 3.55 gears a try in my STR.
I have a plan for an axle set I want to build, but I still have not been able to get each axle out of the 2001 4.0 S-type outer CV joints. I've only had success bending the aluminum based fixture I built. Now I am making a fixture out of 1 x 1-1/2" steel with plans to apply 20 tons.
New donor F150 front half-shafts I purchased, came apart easily using only a slide tube.
Perhaps in the next 2 weeks, we will figure out some more about programming the ZF TCM. It would be fun to swap 3.31 or give 3.55 gears a try in my STR.