Prospeeder Posted January 26, 2006 Report Share Posted January 26, 2006 Ok, first, I cannot find the freakin bolt that holds it on, or even how its held on, the freakin Turbo makes it SUPER hard to see or feel much of anything Second, my dad freaking messed up the Adjustment, so i havent a fuckin clue where it was factory, what the hell should i do?? just try it, and adjust, is softer clockwise or counterclockwise? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 The bolt that holds it on is to the left of the modulator if you are looking at the front of it. Its either 10 or 13mm. As for the adjustment.....just drive it and see how it is. Screwing it in (clockwise) will make it firmer. Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Ok, found it, thanks! i had to move a ground AND a freakin wireloom to get to it, but heres the wierd part, my Modulator didnt have a plunger, and i used a magnetic screwdriver and got what i thought to be the plunger...but it was the 84-86 Stem?! Not the 87+ style with the plunger, what the heck? if you dont know what im talkin about, im uploading a pic in a sec the plunger CAN be removed from the new ATP one, so is that what i should do then? EDIT: Quote Link to comment Share on other sites More sharing options...
Crazy K Posted January 27, 2006 Report Share Posted January 27, 2006 I think you misunderstood. I read that to say " late 1986 and 1987 and later transmissions" meaning late 1986 and 1987 on up. It looks like the same part to me from the pics, Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 It says right there, 84 thu 86 style, thats what mine is, NO plunger, arnt these suppose to have a plunger? And the Late 86, 87 + uses a plunger style wich mine doesnt have See the difference, this is another guys that has the plunger http://homepages.wmich.edu/~s4dykstr/vacoldnew.jpg Mine doesnt, thats my whole question, shouldnt it?? Do i just take the plunger out of the ATP one like the diagram says and install it? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted January 27, 2006 Report Share Posted January 27, 2006 I didn't say anything I'm sorry I misread what you said. I agree it looks like your car had the wrong part... How deep is the plunger into the old modulator when installed? It appears to me that the new one completely does away with the plunger. ans the cylinder sticking out of it;'s end would be the same as the end of the clunger thingy. OR... THe modulator was replaced with a used unit, and the stem was replaced to match the used unit. Might have to score the part from a core, or from GM... Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 I didn't say anything I'm sorry I misread what you said. I agree it looks like your car had the wrong part... How deep is the plunger into the old modulator when installed? It appears to me that the new one completely does away with the plunger. ans the cylinder sticking out of it;'s end would be the same as the end of the clunger thingy. OR... THe modulator was replaced with a used unit, and the stem was replaced to match the used unit. Might have to score the part from a core, or from GM... Well my trans better not have been swapped with an older style, its a TGP with the exclusive 4T60-HD that only TGPs and i think Bonneville Supercharged used, and my car only has 70k, i doubt the trans went The new ATP one i have is designed for both styles, you take out the plunger if its the old style (like mine) or leave it in for the newer style That Stem for the old one is different than the newer one, see the diagram in the photo, i have the old one, so mabye i have a factory fuck up? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted January 27, 2006 Report Share Posted January 27, 2006 I was suggesting that someone may have changed the modulator and the piston thing that goes with it, for a incorrect donor, j/y or otherwise. Find the tag on the tranny to verify what tranny you have. it should also have a serial number on one of the flat vertical surfaces on the right rear of the tranny case. The serial number would match the vin ######. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 Yeah, there should be a plunger. That is odd, the old one looks *similar* to the new one, but not entirely the same. You migh need to some how look in the hole with a flashlight or something and see if you cant see the old plunger. If you cant, check your tranny pan and tell us what is says. Also, look for any rebuild stickers on it. Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Ok I needa know, That Diagram that came with it says JX-69 for the old style, and JX-70 for the new size (part numbers) I REALLY NEED TO KNOW, will this JX-70 be fine just take out the plunger, or do i need to return it and get the JX-69???? Im really confused and nervous to put this one in Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Yeah, there should be a plunger. That is odd, the old one looks *similar* to the new one, but not entirely the same. You migh need to some how look in the hole with a flashlight or something and see if you cant see the old plunger. If you cant, check your tranny pan and tell us what is says. Also, look for any rebuild stickers on it. I used a magnetic screwdriver to pull the "Stem" out wich i thought to be the old plunger. according to the diagram that came with it, the Old style had a different Stem (wich i have) compared to the new one. there was NO plunger in there! I looked all over my frame ground, area everywhere seeing if mabye it fell out, but no http://img.photobucket.com/albums/v210/Prospeeder/writingmod.jpg Any one notice my modulator looks nothing like OEM style ones from other peoples cars or my diagram that came with the new one? Also now im not sure if the NEW one is compatible with the older style 84-86.... man this is so wierd Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 Hmmm....that is just weird. Old style modulator in a "new" style tranny. I really have no idea how that works, lol. I dont know what to tell ya. What it shifting or doing anything weird before you pulled the mod. out? Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Hmmm....that is just weird. Old style modulator in a "new" style tranny. I really have no idea how that works, lol. I dont know what to tell ya. What it shifting or doing anything weird before you pulled the mod. out? It seemed to have a hard shift in and or of reverse and drive, but otherwise shifted normally, except somtimes it would SLAM into gear really hard if you gave it partal throttle, wich is why im replacing this and dog bones, god what have i done, i gotta drive this thing soon SOME one has to have an idea, man this is horrible, i just wanted to fuckin get this replaced before i put insurance on it and drive it and somthing like this ALWAYS happens, somthing easy turns into a fucking nightmare Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Ok, i looked on this catalog, https://www.rockauto.com/dbphp/mfr,ATP,Transmission-Automatic,8500,Modulator It shows the JX-69 (old style) for the 88-90 Grand Prix 3.1 TURBO ONLY (For the same 1990 3.1 or the 2.8 it says the JX-70) it says and then the JX-70 (Newer plunger style) For 91+ and the 88-90 3.1 mabye my car IS suppose to have one :? Mabye its a HD thing?? Im so freakin confused! Im going to do a more through look for a plunger, if nothing, im going to reinstall the stock one again, see if all is well, if it is, im going to get a JX-69 adjust it properly, and put it in Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 Huh, interesting about the use of the older style in the HD trannys. Surely a TGP guy can verify this. Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Some1 said just to take the plunger of the New one out and install and it will be fine, but i dunno wich way the stem goes in :? Quote Link to comment Share on other sites More sharing options...
dbtk2 Posted January 27, 2006 Report Share Posted January 27, 2006 TGP's DID NOT have a plunger on the modulator. Don't know why they decided to use the older style modulator on them, but they did. Shawn Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 TGP's DID NOT have a plunger on the modulator. Don't know why they decided to use the older style modulator on them, but they did. Shawn I guess I learn something new everyday...that is still weird though. Quote Link to comment Share on other sites More sharing options...
TeeJay3800 Posted January 27, 2006 Report Share Posted January 27, 2006 The only info I can give here is that the 1990 N/A 3.1 with 4T60 does indeed use the JX-70 modulator. I had no plunger problems though, the new modulator was a direct swap. BTW, I never did find those pics lol. Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 Ok, so Is the JX-69 the same as the JX-70 except no Plunger? Like i could just take the plunger out of th e JX-70 and stick it in, or am i gonna have to return this and wait another 4 days for a new JX-69? Quote Link to comment Share on other sites More sharing options...
TeeJay3800 Posted January 27, 2006 Report Share Posted January 27, 2006 I dunno. When I searched ATP's site (http://www.atp-inc.com), BOTH the JX-69 and JX-70 came up for the '90 TGP. My best guess is that the plungers are the same, but I'm not sure if they can be swapped in and out like that. If it were me, for my own peace of mine I would just get a whole new modulator and start fresh. Why do you have to wait 4 days? Several parts stores near me had them in stock. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted January 27, 2006 Report Share Posted January 27, 2006 Ok, so Is the JX-69 the same as the JX-70 except no Plunger? Like i could just take the plunger out of th e JX-70 and stick it in, or am i gonna have to return this and wait another 4 days for a new JX-69? Yeah, you sholud be able to just take the piece off the -70 and you'll have the -69 Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted January 27, 2006 Author Report Share Posted January 27, 2006 I got it all figured out, thanks, i found the perfect shift, nice, crisp and fast, and much smoother, and it hasnt made the JOLT into 1-2 on partal throttle thanks ALL! Quote Link to comment Share on other sites More sharing options...
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