Had the privilege of working on a jwibbity's supercharged Marauder from MM.net. He brought the car to me saying the transmission was shifting "funny"
read here; http://www.mercurymarauder.net/forum...ad.php?t=91968.
On the test drive the 2-3 shift would flare slightly, then slide into 3rd gear and overall the shifts were not crisp and consistent. I am told the transmission was rebuilt previously by another transmission shop, 2-3 yrs ago.
Once the fluid was drained, the magnet and pan looked clean
During tear down, I found no major damage. There was evidence the valve body had a TransGo kit install at one time
but appeared it had been removed by the previous shop that rebuilt the transmission recently. The valve body already had the
improved Sonnax pressure regulator valve and it had a superior "Tuff" plate, separator plate installed. I also found the o-rings for the shift solenoid were worn and one was cut.
The Forward clutches were slightly worn and discolored and appeared to have been machined improperly when then were manufactured. The grooving was cut all the way down to the metal, this is not normal.
I did a full rebuild with new clutches, seals and gaskets. One of my normal upgrades on these transmissions is to remove the wave spring from the forward clutch and increase the clutch pack to 6 clutches. I also upgraded the intermediate shaft to a stronger one made out of 300m and upgraded the mechanical diode one way clutch to a newer, factory part that has more locking teeth.
I also did a forced lube to the extension housing bushing. It was a good thing this was done, because worn u-joints were starting
to damage the bushing. It was pitted and showing moderate wear
The drive shaft was sent to out for new HeavyDuty u-joints and a high speed balance.
We used a 11" converter from Blue Oval chips; http://www.blueovalchips.com/index.p...t_detail&p=273
It's an upgrade converter from CircleD
Got the transmission back in the car, refilled with fluid and went for a drive. 1-2 shift was OK but not great, 2-3 shift was horrible
and 3-4 shift would flare and slip.
I pull the pan and valve body and found the gasket between the case and valve body had slipped off the lower alignment dowel and torn. I replace the gasket and for giggles installed a new OD servo piston. Another test drive and it was better, but not great. There was also a Violent downshift when slowing to a stop, as if another car was hitting you from behind.
At this point I was out time and the owner was on his way to pick up the car. We both had prior engagements that prevented me from working on the car any further at that time, so he took the with the understanding I would work on it again.
Fast forward to the 3rd week of April, I drove up and towed the car back to my shop. Pulled the transmission back out, completely went through it and found nothing wrong.
I suspected a bad front pump was to blame for the soft shifts, so I replaced the pump with a good used one and new pump gears.
I put the forward clutch back to 5 clutches and installed the HeavyDuty wave spring from a 5.4L truck; XL3Z-7E085-A
I replaced the OD band with another new high carbon band, and I replaced the Intermediate and Direct clutches and steels with new Raysbestos parts.
while it was apart again, I installed a Metco drive shaft safety loop and installed a secondary transmission cooler.
Put everything back together and went for a drive. Shifts were still soft and OD slipped, but the harsh down shift was gone. Since I was confident there was nothing wrong with the transmission internally, I decided to install a different valve body.
BAM!... That fixed it ! Firm, positive shifts, it even barked the 1-2 shift a couple of times at half throttle.
read here; http://www.mercurymarauder.net/forum...ad.php?t=91968.
On the test drive the 2-3 shift would flare slightly, then slide into 3rd gear and overall the shifts were not crisp and consistent. I am told the transmission was rebuilt previously by another transmission shop, 2-3 yrs ago.
Once the fluid was drained, the magnet and pan looked clean
During tear down, I found no major damage. There was evidence the valve body had a TransGo kit install at one time
but appeared it had been removed by the previous shop that rebuilt the transmission recently. The valve body already had the
improved Sonnax pressure regulator valve and it had a superior "Tuff" plate, separator plate installed. I also found the o-rings for the shift solenoid were worn and one was cut.
The Forward clutches were slightly worn and discolored and appeared to have been machined improperly when then were manufactured. The grooving was cut all the way down to the metal, this is not normal.
I did a full rebuild with new clutches, seals and gaskets. One of my normal upgrades on these transmissions is to remove the wave spring from the forward clutch and increase the clutch pack to 6 clutches. I also upgraded the intermediate shaft to a stronger one made out of 300m and upgraded the mechanical diode one way clutch to a newer, factory part that has more locking teeth.
I also did a forced lube to the extension housing bushing. It was a good thing this was done, because worn u-joints were starting
to damage the bushing. It was pitted and showing moderate wear
The drive shaft was sent to out for new HeavyDuty u-joints and a high speed balance.
We used a 11" converter from Blue Oval chips; http://www.blueovalchips.com/index.p...t_detail&p=273
It's an upgrade converter from CircleD
Got the transmission back in the car, refilled with fluid and went for a drive. 1-2 shift was OK but not great, 2-3 shift was horrible
and 3-4 shift would flare and slip.
I pull the pan and valve body and found the gasket between the case and valve body had slipped off the lower alignment dowel and torn. I replace the gasket and for giggles installed a new OD servo piston. Another test drive and it was better, but not great. There was also a Violent downshift when slowing to a stop, as if another car was hitting you from behind.
At this point I was out time and the owner was on his way to pick up the car. We both had prior engagements that prevented me from working on the car any further at that time, so he took the with the understanding I would work on it again.
Fast forward to the 3rd week of April, I drove up and towed the car back to my shop. Pulled the transmission back out, completely went through it and found nothing wrong.
I suspected a bad front pump was to blame for the soft shifts, so I replaced the pump with a good used one and new pump gears.
I put the forward clutch back to 5 clutches and installed the HeavyDuty wave spring from a 5.4L truck; XL3Z-7E085-A
I replaced the OD band with another new high carbon band, and I replaced the Intermediate and Direct clutches and steels with new Raysbestos parts.
while it was apart again, I installed a Metco drive shaft safety loop and installed a secondary transmission cooler.
Put everything back together and went for a drive. Shifts were still soft and OD slipped, but the harsh down shift was gone. Since I was confident there was nothing wrong with the transmission internally, I decided to install a different valve body.
BAM!... That fixed it ! Firm, positive shifts, it even barked the 1-2 shift a couple of times at half throttle.
we like barking the tires.
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