lentech automatics

redrider · 12-20-2001, 09:04 AM

I have an 88GT with 550 crank horsepower. I bought a lentech street terminator plus about 4 months ago and now I'm sending it back for a new one. I started to pass a car at about 50 when all of a sudden the engine revved wildly. After that I limped home barely able to make the car move. The tranny is rated to 700 horsepower. I have long tubbe headers that make contact with the pan and wondered if the heat may have broken down the fluid. There is another weird occurence I have experienced with the former aod also. When I slow down for a light at about 20 I get a forcefull drop in speed which seems to come from the rear end. I have a true trak diff with 4.10 gears and the mechanic that reinstalled the moser axles had to grind them down because the diff made them too long. He did have a tough time fitting the right side axle in and I wonder if that could be causing the bind that I get when slowing down. Also this sudden drop in speed may affect the tranny indirectly.

Please help me out with ideas for a fix.
Thanks

91GTturbo · 12-20-2001, 07:41 PM

I just stopped in to read your post because I've considered going to one of their transmissions, so I usually read most posts when they are included. I have a question for you?

How do you know you make that much horsepower? I don't think 24 lbs injectors can make that much hp, which you have listed in your sig. No flames, just wondering.

Sorry I couldn't help out with your problems, but good luck.

Stang Runner · 12-20-2001, 08:27 PM

NO WAY Will it every make 550HP NEVER!!!! the PSI would need to be 156PSI going to the Injectors and MAX is about 80PSI AND I dont think the Injectord will do that. What times does it Run.... I think you might need new Ijectors I am trying to help.

or is that with the 150 shot 400Hp is good with 24's is the kit a dry one?

Stang Runner · 12-20-2001, 10:33 PM

sorry about that...

I dont know anything about the tranny Good luck!!

Jeff Chambers · 12-21-2001, 07:34 AM

I'll have to agree that the HP estimates are over-optimistic on 24#, even with the 150 shot of giggle gas. If I'm reading your sig correctly, you've just got the Lentech VB and not the complete trans? Your hard hit at 20mph sounds like a problem with the governed downshift to low after engine braking in 2nd. Be sure and explain all symptoms to Len/Ross/Chris at Lentech when you give them a call. They may be able to diagnose a line pressure problem (or something else). It could be a problem with too much/little clearance in the clutch packs as well. Like I said, give them as much description on the problem as possible and they should be able to diagnose it. I guess what I'm trying to say is that if it is someone else's trans (or stock) with a Lentech VB, the problems may not be related to the VB at all.

As far as the axles go, there should be some clearance between the axle end and the cross-shaft. If I remember correctly, the factory spec is something like 0.030". It could be bound up (especially when things expand when hot) if he had to force the axles/cross-shaft into place when assembling the rear. Doesn't sound real kosher to me.

Mach 1 · 12-21-2001, 10:26 AM

I dont think an axle bind would occur at only one particular speed and situation (slowing down). I would look elsewhere for your troubles. You sure it not just the AOD downshifting like it does normally when slowing down?

88COBRA · 12-21-2001, 12:20 PM

Now I am not a AOD expert, well not yet

, but I would say it sounds like your Lentech is just downshifting. The line pressure is greatly increased and with that valve body it will downshift with more authority.

As Jeff said, give Lentech a call to make sure.

Ian

12-20-2001, 09:04 AM	#1
redrider Registered Member Join Date: Apr 1999 Location: seffner, Florida, usa Posts: 95	lentech automatics I have an 88GT with 550 crank horsepower. I bought a lentech street terminator plus about 4 months ago and now I'm sending it back for a new one. I started to pass a car at about 50 when all of a sudden the engine revved wildly. After that I limped home barely able to make the car move. The tranny is rated to 700 horsepower. I have long tubbe headers that make contact with the pan and wondered if the heat may have broken down the fluid. There is another weird occurence I have experienced with the former aod also. When I slow down for a light at about 20 I get a forcefull drop in speed which seems to come from the rear end. I have a true trak diff with 4.10 gears and the mechanic that reinstalled the moser axles had to grind them down because the diff made them too long. He did have a tough time fitting the right side axle in and I wonder if that could be causing the bind that I get when slowing down. Also this sudden drop in speed may affect the tranny indirectly. Please help me out with ideas for a fix. Thanks __________________ 88 GT mass air conversion from 90lx, Cobra Intake(ported/polished lower),Edlebrock Aluminum Heads(ported/polished),38# injectors 70 mm BBK TB, 77mm Pro M, Coast High 347 SB, Wolverine custom cam, Vortech T Trim w power pipe(13lbs), fmu & boost retard, 255lb fuel pump (BBK off road H pipe, Dynomax cat back, alum driveshaft w safety loop, Konis,Southside Bars w chromemoly torque boxes,AOD w lentech valve body, B&M MegaShifter, 4.10 with True Track locker, SVO springs, subs, cross drilled rotors, Nitto Drag Radials,MSD A6, black magic fan etc.

12-20-2001, 07:41 PM	#2
91GTturbo Registered Member Join Date: May 2001 Location: Valdese, NC Posts: 361	I just stopped in to read your post because I've considered going to one of their transmissions, so I usually read most posts when they are included. I have a question for you? How do you know you make that much horsepower? I don't think 24 lbs injectors can make that much hp, which you have listed in your sig. No flames, just wondering. Sorry I couldn't help out with your problems, but good luck. __________________ 91 single turbo vert

12-20-2001, 08:27 PM	#3
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	NO WAY Will it every make 550HP NEVER!!!! the PSI would need to be 156PSI going to the Injectors and MAX is about 80PSI AND I dont think the Injectord will do that. What times does it Run.... I think you might need new Ijectors I am trying to help. or is that with the 150 shot 400Hp is good with 24's is the kit a dry one? __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm Last edited by Stang Runner; 12-20-2001 at 08:46 PM..

12-20-2001, 10:33 PM	#4
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	sorry about that... I dont know anything about the tranny Good luck!! __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

12-21-2001, 07:34 AM	#5
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	I'll have to agree that the HP estimates are over-optimistic on 24#, even with the 150 shot of giggle gas. If I'm reading your sig correctly, you've just got the Lentech VB and not the complete trans? Your hard hit at 20mph sounds like a problem with the governed downshift to low after engine braking in 2nd. Be sure and explain all symptoms to Len/Ross/Chris at Lentech when you give them a call. They may be able to diagnose a line pressure problem (or something else). It could be a problem with too much/little clearance in the clutch packs as well. Like I said, give them as much description on the problem as possible and they should be able to diagnose it. I guess what I'm trying to say is that if it is someone else's trans (or stock) with a Lentech VB, the problems may not be related to the VB at all. As far as the axles go, there should be some clearance between the axle end and the cross-shaft. If I remember correctly, the factory spec is something like 0.030". It could be bound up (especially when things expand when hot) if he had to force the axles/cross-shaft into place when assembling the rear. Doesn't sound real kosher to me. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

12-21-2001, 10:26 AM	#6
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	I dont think an axle bind would occur at only one particular speed and situation (slowing down). I would look elsewhere for your troubles. You sure it not just the AOD downshifting like it does normally when slowing down? __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

12-21-2001, 12:20 PM	#7
88COBRA STANGPOWER.COM Join Date: Jun 1999 Location: Ontario, Canada Posts: 1,045	Now I am not a AOD expert, well not yet , but I would say it sounds like your Lentech is just downshifting. The line pressure is greatly increased and with that valve body it will downshift with more authority. As Jeff said, give Lentech a call to make sure. Ian __________________ My WebSites: VortechPower.com - Brand new site for Vortech users! NOVIPOWER.COM - Devoted to the performance of the NOVI supercharger STANGPOWER.COM - A small community based in Canada for Mustangs *MORE WebSites Coming soon* PLEASE NOTE: I am not an affiliate (nor do I work for) any Mustang parts retailers - I create informational Mustang WebSites

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