96 bird lx 4.6 .. trans slipping or something else ?? - TCCoA Forums

 
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post #1 of 14 (permalink) Old 05-13-2017, 07:01 PM Thread Starter
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96 bird lx 4.6 .. trans slipping or something else ??

When taking off from a dead stop the car shifts weird and is very sluggish.. also when cruising down the freeway about 65mph it feels Like it stops accelerating for a second.. it's not dropping rpms but feels like a slip or something..
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post #2 of 14 (permalink) Old 05-13-2017, 07:08 PM
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If the trans were slipping, the rpms would go up while the speed stays the same.

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post #3 of 14 (permalink) Old 05-13-2017, 08:26 PM
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Can you elaborate on "shifts weird"? Takes a while to engage/shift, engages/shifts with a bang, irregular engagement/shifting, etc.?

-Brandon
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post #4 of 14 (permalink) Old 05-13-2017, 09:22 PM Thread Starter
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I'd say it's more like irregular shifts .. Its not slipping and there are no bangs or noises. It just shifts very sluggish and at weird times i don't know maybe torque converter or shift solenoid going bad??
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post #5 of 14 (permalink) Old 05-14-2017, 06:26 AM
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Well to be fair, the stock 96 trans shifts are slow and sloppy from the factory (esp a 4-3 shift). Is what you're experiencing a change or has it always been this way?

-Brandon
97 Laser Red Thunderbird LX 156k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
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post #6 of 14 (permalink) Old 05-14-2017, 09:43 AM
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Have you been changing the trans fluid per manufacturer's specifications / numerous posts on this website? If you're thinking the trans fluid needs changing it probably does.
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post #7 of 14 (permalink) Old 05-14-2017, 10:34 AM Thread Starter
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I have noticed a change when shifting from 2nd to 3rd it seems like it looses power and the rpms go up then drop real low not like normal shifting ... I just rolled over 90000 miles and have regularly checked trans fluid ..Smells ok and isn't low but maybe I should change it anyway also any additives that you would recommend
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post #8 of 14 (permalink) Old 05-14-2017, 12:55 PM
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Well... 1st has a ratio of 2.84:1. 2nd gear has a ratio of 1.55:1. Both 1 and 2 don't lock the torque converter, so the ratio seems much higher in terms of actual engine speed to output shaft speed due to the torque multiplication through the unlocked converter. When it shifts to 3rd, the ratio drops to 1.00:1, then a second or so later the torque converter locks. So RPM will typically go from 1600 or so in 2nd down to maybe 1000-1100 if you're not heavy into the throttle.

-Brandon
97 Laser Red Thunderbird LX 156k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
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post #9 of 14 (permalink) Old 05-14-2017, 01:32 PM
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Don't put any additives in it. Just use fresh Mercon V.

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post #10 of 14 (permalink) Old 05-14-2017, 08:37 PM Thread Starter
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Maybe it's just me lol.. the miles are getting up there so I'm going to change the trans fluid and filter.. thanks for all the advice guys
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post #11 of 14 (permalink) Old 05-15-2017, 06:02 AM
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post #12 of 14 (permalink) Old 05-15-2017, 11:36 AM
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J-Mod that bad boy while you're in there!

Mods? Yea, I got mods ...
Air silencer delete, warp drive, dilithium crystals, flux capacitor, Slingshot Rubber band power adder, Moonshine & Gas, Leaf Blower Supercharger, Hamster Wheel & Hamster, Energizer Bunny generating 1.21 gigawatts, Mr. Fusion® Home Energy Reactor, hover conversion and a sextant celestial navigation system (The original GPS)
Best 1/4: 1,320 nanoseconds @ 670,616,629.2 miles per hour

"There isn't that much difference anymore between spacecraft, aircraft and modern automobiles..." - Keith Henry, NASA's Langley Research Center
See a list of my real mods and pictures of my car HERE. The true performance of my car was made possible by the Carolinas Crew Chief, RobertP at Rob's Tire & Auto.
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post #13 of 14 (permalink) Old 05-15-2017, 04:21 PM Thread Starter
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What's the deal with the j mod .. something I could do at home? Any special tools needed?
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post #14 of 14 (permalink) Old 05-15-2017, 05:17 PM
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Not really, just some special sized drill bits, depending on how you choose to set it up.

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And here: http://www.tccoa.com/articles/tranny...business.shtml

-Brandon
97 Laser Red Thunderbird LX 156k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
96 Ivory Mark VIII 235k, stock 4.6 32v on coils; New engine at 185k
Gone but not forgotten: 94 Cougar XR7, 93 Mark VIII

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Once you have tasted flight, you will walk the world with your eyes turned skyward, for there you have been and there you long to return. -Leonardo da Vinci
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