I’ve finally ‘recovered’ enough to provide a thread about my driveway J-mod experience. For those who haven’t seen Rizzo’s J-mod video yet, here's a link:
and here’s a link for other J-mod info:
As some may know, I like to suck out the tranny fluid through the fill tube. Here’s a pic of my setup:
And here’s a pic showing how much is left in the pan:
The tube actually gets stopped by the filter:
I’ll probably cut the edge off the tube and see how that works.
Here’s a pic showing how dark my fluid was:
It had been at least that bad when I changed my fluid in summer 2014.
Here’s a pic showing how dirty my valve body was:
I’m guessing the detergents in the fluid had been maxed out and couldn’t hold any more gunk.
I left the springs in. For the hole sizes, I used ones provided by 88grandmarq. When I measured mine, they didn’t seem to be perfectly round, so I recorded the largest reading I could get. Here’s a table showing the intended stock, actual, and target sizes:
1-2/2-1 shifts:
#1....0.160.............0.166..................... .....no change required
#2....0.081-0.089....0.067 (yup, six seven).....0.1015 (#38 drill)
#3....0.180.............0.167 (yup, six seven)....no change required but I filed it to 0.180
manual 2-1 downshift:
#7....0.078-0.081....0.080....not needed but I did 0.125 for the helluvit
I figured it might have some use in winter driving. I haven’t gotten around to trying it yet. I keep forgetting.
2-3/3-2 shifts:
#4.....0.81.....0.78.....0.110 (7/64 drill)
#5.....0.81.....0.79.....0.110 (7/64 drill)
holes in gasket for #4&5 need expanding, I wasn’t comfortable with a 1/8 punch so I just squared them out with a blade after checking the fluid passage pattern on the old gasket
#6....0.125....0.131....0.160 (#20 drill)
3-4/4-3 shifts:
#8................not used....0.236.........................not used
gasket slot 1..very thin....0.025...........................0.100
#9..................0.081.......0.085............. .............0.110 (7/64 drill)
#11................0.110.......0.067 (yup, six seven)....0.110 (7/64 drill)
reverse:
#10....0.078-0.081....0.070 (yup, seven zero)....0.089-0.093 (I used a 3/32 drill)
When I checked some holes after drilling, they ended up being ~0.004-0.005 over the target at their widest points (though I haven’t noticed any issues). I was planning on recording the finished sizes, but I guess it slipped my mind. I would guess the enlargement is a matter of not drilling perfectly straight and/or having cheap drill bits. I ended up with a few nasty burrs too despite putting plywood underneath. I used a magnifying glass to make sure I cleaned them up properly.
As per 88grandmarq's suggestion, I replaced the pressure regulator valve and boost valve and sleeve. Boy did it need them:
While the pics make it seem that the wear on the pressure regulator valve was only in one spot, there was a little bit of wear apparent on the opposite side too. I hadn’t noticed any obvious issues with how the car drove, and it’s not something I would have thought of myself, so a big THANKS!! to 88grandmarq.
Since I’d heard about tranny filters occasionally working their way loose and falling into the pan, I decided to use some galvanized strapping to keep it in place (especially after seeing that the suction tube hits it). I put a long piece under one valve body bolt and a short piece under another valve body bolt and bolted them together after the filter was installed:
I actually had a helluva time getting the filter in all the way. Getting it in part way was easy enough, but it obviously had more to go. I positioned myself to get as much pushing force from my hand as possible, and I was worried about bending the damn filter, but it eventually went in. I’d guess at least some cases of the filter falling out is people not realizing how far it’s supposed to go in.
I didn’t bother cleaning the pan magnet and checking the old filter until afterwards. The thick stuff on the magnet seemed normal enough, but I ended up finding a few slivers of metal among that stuff when I cleaned it. I also found a bit of metal in the filter:
Are there any scenarios where bits of metal don’t indicate the start of an eventual premature failure?
Performance wise, the effects have been more subtle than dramatic, but that’s just fine since I’m only interested in the life-prolonging benefit rather than anything else. If my mind is elsewhere and I’m driving casually, I might not even notice the shifts. Now that I think about it, I haven’t really noticed anything significant with the downshifts, though I haven’t really been paying attention to those. Most of the time I can feel the up-shifts. Whereas before I could not really tell when 1-2 was happening, I can tell now. It’s kind of annoying knowing 1-2 happens during turns from a stop.
I reserve my WOT use for the highway, so I don’t know if 1-2 will chirp a tire (with open diff), but 2-3 certainly does. I really need a tire rotation now.
One annoying thing is that reverse wasn’t benefited as much as I was hoping. The shift itself is more pronounced, but it seems that the time between the lever going into R and the start of the shift is still long. This is how I am about that:
Overall, very happy. Thanks again 88grandmarq!
and here’s a link for other J-mod info:
As some may know, I like to suck out the tranny fluid through the fill tube. Here’s a pic of my setup:
And here’s a pic showing how much is left in the pan:
The tube actually gets stopped by the filter:
I’ll probably cut the edge off the tube and see how that works.
Here’s a pic showing how dark my fluid was:
It had been at least that bad when I changed my fluid in summer 2014.
Here’s a pic showing how dirty my valve body was:
I’m guessing the detergents in the fluid had been maxed out and couldn’t hold any more gunk.
I left the springs in. For the hole sizes, I used ones provided by 88grandmarq. When I measured mine, they didn’t seem to be perfectly round, so I recorded the largest reading I could get. Here’s a table showing the intended stock, actual, and target sizes:
1-2/2-1 shifts:
#1....0.160.............0.166..................... .....no change required
#2....0.081-0.089....0.067 (yup, six seven).....0.1015 (#38 drill)
#3....0.180.............0.167 (yup, six seven)....no change required but I filed it to 0.180
manual 2-1 downshift:
#7....0.078-0.081....0.080....not needed but I did 0.125 for the helluvit
I figured it might have some use in winter driving. I haven’t gotten around to trying it yet. I keep forgetting.
2-3/3-2 shifts:
#4.....0.81.....0.78.....0.110 (7/64 drill)
#5.....0.81.....0.79.....0.110 (7/64 drill)
holes in gasket for #4&5 need expanding, I wasn’t comfortable with a 1/8 punch so I just squared them out with a blade after checking the fluid passage pattern on the old gasket
#6....0.125....0.131....0.160 (#20 drill)
3-4/4-3 shifts:
#8................not used....0.236.........................not used
gasket slot 1..very thin....0.025...........................0.100
#9..................0.081.......0.085............. .............0.110 (7/64 drill)
#11................0.110.......0.067 (yup, six seven)....0.110 (7/64 drill)
reverse:
#10....0.078-0.081....0.070 (yup, seven zero)....0.089-0.093 (I used a 3/32 drill)
When I checked some holes after drilling, they ended up being ~0.004-0.005 over the target at their widest points (though I haven’t noticed any issues). I was planning on recording the finished sizes, but I guess it slipped my mind. I would guess the enlargement is a matter of not drilling perfectly straight and/or having cheap drill bits. I ended up with a few nasty burrs too despite putting plywood underneath. I used a magnifying glass to make sure I cleaned them up properly.
As per 88grandmarq's suggestion, I replaced the pressure regulator valve and boost valve and sleeve. Boy did it need them:
While the pics make it seem that the wear on the pressure regulator valve was only in one spot, there was a little bit of wear apparent on the opposite side too. I hadn’t noticed any obvious issues with how the car drove, and it’s not something I would have thought of myself, so a big THANKS!! to 88grandmarq.
Since I’d heard about tranny filters occasionally working their way loose and falling into the pan, I decided to use some galvanized strapping to keep it in place (especially after seeing that the suction tube hits it). I put a long piece under one valve body bolt and a short piece under another valve body bolt and bolted them together after the filter was installed:
I actually had a helluva time getting the filter in all the way. Getting it in part way was easy enough, but it obviously had more to go. I positioned myself to get as much pushing force from my hand as possible, and I was worried about bending the damn filter, but it eventually went in. I’d guess at least some cases of the filter falling out is people not realizing how far it’s supposed to go in.
I didn’t bother cleaning the pan magnet and checking the old filter until afterwards. The thick stuff on the magnet seemed normal enough, but I ended up finding a few slivers of metal among that stuff when I cleaned it. I also found a bit of metal in the filter:
Are there any scenarios where bits of metal don’t indicate the start of an eventual premature failure?
Performance wise, the effects have been more subtle than dramatic, but that’s just fine since I’m only interested in the life-prolonging benefit rather than anything else. If my mind is elsewhere and I’m driving casually, I might not even notice the shifts. Now that I think about it, I haven’t really noticed anything significant with the downshifts, though I haven’t really been paying attention to those. Most of the time I can feel the up-shifts. Whereas before I could not really tell when 1-2 was happening, I can tell now. It’s kind of annoying knowing 1-2 happens during turns from a stop.
I reserve my WOT use for the highway, so I don’t know if 1-2 will chirp a tire (with open diff), but 2-3 certainly does. I really need a tire rotation now.
One annoying thing is that reverse wasn’t benefited as much as I was hoping. The shift itself is more pronounced, but it seems that the time between the lever going into R and the start of the shift is still long. This is how I am about that:
Overall, very happy. Thanks again 88grandmarq!
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