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GTA TECH Want to discuss technical topics about your GTA.... engine tuning, mechanical upgrades, problem areas, etc.? Then post it HERE! |
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#21 | |
"The only thing to fear is.............fear itself"
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Re: Bad vibration when down shifting
Quote:
I don know why they are 2 different prices even though the Vigilante conv are supposed to be good so I have heard.
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![]() Cliff Jones 1991 GTA Trans Am w/305,231 miles on the original motor!!!! Time of Death on motor, 4:07pm on 05/29/2010. ![]() Hp:211.2@4200rpms/Tq.328.5@2700rpms Best et: 13.959@97.05mph Best mph: 98.3 Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them ![]() |
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#22 | |
"The only thing to fear is.............fear itself"
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Re: Bad vibration when down shifting
Quote:
http://tciauto.com/Products/Converters/ I noticed you live in Marietta, correct? I might be able to save you a call to Summit. Call the # below and ask for Wade. 770-422-1746 tell him Cliff told you to call.
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![]() Cliff Jones 1991 GTA Trans Am w/305,231 miles on the original motor!!!! Time of Death on motor, 4:07pm on 05/29/2010. ![]() Hp:211.2@4200rpms/Tq.328.5@2700rpms Best et: 13.959@97.05mph Best mph: 98.3 Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them ![]() |
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#23 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Quote:
http://www.tciauto.com/Products/Conv...plications.asp There's a chart for GM 700R4's, showing two(2) part numbers. It also says that one of the items is a 12" diameter converter. Which one should I consider for my 1991 GTA? Thanks! |
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#24 |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
See the footnotes that apply to the two(2) Breakaway part numbers.
Which Breakaway did you buy for your 1991? Footnotes: Part Number 242800 footnotes 2,8 2 Functional lock-up torque converter only for lock-up transmissions. 8 12" diameter converter. Part number 242962 footnotes 3,9 3 With heavy duty front anti-ballooning plate for nitrous applications. 9 Non Lock-up (Ford AOD applications MUST use TCI 439600 input shaft) |
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#25 |
"The only thing to fear is.............fear itself"
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Re: Bad vibration when down shifting
You need the 242800.
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![]() Cliff Jones 1991 GTA Trans Am w/305,231 miles on the original motor!!!! Time of Death on motor, 4:07pm on 05/29/2010. ![]() Hp:211.2@4200rpms/Tq.328.5@2700rpms Best et: 13.959@97.05mph Best mph: 98.3 Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them ![]() |
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#26 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
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#27 |
Bad luck or no luck
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Re: Bad vibration when down shifting
you have a double adjustable panhard bar then if it screws in on both sides. the best converters out there are EDGE, Vigilante, and Yank. a 2500 stall would be great for your car. Also one thing to consider, the smaller (physical size) the converter the better. The smaller the converter, the longer your tranny will usually live, and you also have less weight. the less weight means less rotational mass also. Most of the converters made by the 3 companies i listed are 10 inch or 9 inch. Most others by other companies are 11 or 12 inch.
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87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#28 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Quote:
Thanks again!
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![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip |
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#29 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Quote:
Vigilante 9.5" Single Disk Lock-up Torque Converter, 200R4, 700R4/4L60E, 4L80E Is that what I would consider? Fearthis (Cliff) recommends the TCI Breakaway. I appreciate all comments!
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![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip |
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#30 |
Bad luck or no luck
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Re: Bad vibration when down shifting
for your car a TCI would be fine. if you want something serious, go with a vigilante. they have less weight, higher strength ratings, and higher torque multiplication factors to them. the single disk vigilante with a 2600 stall would be great, the 3 disk would be ideal. it really depends on how much money you want to spend. want something good? get the TCI. want something great? get the vigilante.
https://www.700r4l60e.com/store/cust...&cat=60&page=1
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87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#31 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Quote:
__________________
![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip |
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#32 | |
Bad luck or no luck
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Re: Bad vibration when down shifting
Quote:
maybe somebody else would have some better input on this, i've never adjusted one. look at these panhard bars and see which type you have. i'm guessing you have the one in the last picture. the first picture shows an "on car" adjustable panhard bar. http://spohn.net/productimages/ACF167C.JPG http://spohn.net/productimages/106_big.JPG http://spohn.net/productimages/103_big.jpg
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87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#33 | |
Bad luck or no luck
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Re: Bad vibration when down shifting
Quote:
http://www.converter.cc/ http://www.edgeracingconverters.com/
__________________
87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#34 |
"Firehawk" GTA owner
Join Date: Oct 2001
Location: Brooklyn, NYC
Posts: 1,656
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Re: Bad vibration when down shifting
I use the Vigilante 2600 stall in my GTA and it's amazing how much of a difference it made. I hardly know it's there until I ram the pedal through the firewall. Honestly, you get what you pay for. I went with the more expensive Vigilante because they had nothing but great reviews.
Oh and get yourself a tranny cooler if it doesn't have one already.
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Fred 1991 Trans Am GTA... Hopefully again |
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#35 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Quote:
<img src=http://i98.photobucket.com/albums/l268/ukharry/ACF166F.jpg /> Munson, you said "but just by thinking about what you are describing, i'd say that to move the axle, you would have to screw out the axle side as you mentioned and that would put it back under the center of the car." Well, just by coincidence the only end that has clearance for a wrench is the LEFT(AXEL END) of the bar. Good catch! Thanks!
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![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip Last edited by HARRYS91GTASLP; 03-31-2007 at 01:28 AM. |
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#36 | |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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![]() Quote:
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__________________
![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip |
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#37 |
Atlanta
Join Date: Nov 2004
Location: Atlanta
Posts: 350
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Re: Bad vibration when down shifting
Oh well... I just remembered; I have Control Arms, and I would have to break the welds on their existing mounting brackets and weld them into new positions on the axle after adjusting the offset....
I will have to accept the slight offset, and go with the solution that will address the real cause of the vibration when downshifting in all gears, and that is to assume that the Torque Converter is toast. I will get my transmission guy test drive the car to validate our theory. Thanks for all the help everyone! Look forward to meeting-up with you guys someday, perhaps at a meet and greet car show. Keep me informed if one is scheduled anywhere in Georgia. The beer's on me!
__________________
![]() 1991 Trans Am GTA SLP High-Flow Intake Runners, Shift Kit, Headers, G & S Custom Dual-Cat Exhaust, Air Induction, Tokico Suspension System, Performance Chip |
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#38 | |
"Firehawk" GTA owner
Join Date: Oct 2001
Location: Brooklyn, NYC
Posts: 1,656
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Re: Bad vibration when down shifting
Quote:
__________________
Fred 1991 Trans Am GTA... Hopefully again |
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#39 | |
Bad luck or no luck
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Re: Bad vibration when down shifting
Quote:
__________________
87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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#40 | |
Bad luck or no luck
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Re: Bad vibration when down shifting
Quote:
__________________
87 GTA: Forged 408 LSX short block, TEA stage 2 cnc ported 243 heads, BTR Stage 3 stroker cam, Fast 102 intake, NW 102 TB, Longtube headers, custom 411 ECM, custom harness, custom tuned, Performabuilt stage 2 4l60E with PTC 2800 stall, 9 bolt rear with 3.70 gears and TAP girdle. 11.16 at 123 mph. |
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