Loud thud when i shift

Agent_4573 · 12-05-2002, 06:58 PM

Ok so ive got an 89 lx w/ a 5 speed. Everytime i shift and the rpms drop more than 2 or 3 hundred, i hear a thud. It kind of sounds like a backfire but its not. I checked the driveshaft bolts and they're tight. So are the tranny mounts. I couldn't see anywhere under the car that looks like its getting hit, but i still hear the sound....

Any ideas?

AntwaanRandleEL · 12-05-2002, 08:06 PM

How cold is it where you are? I live in northern Illinois and its cold as hell here. If I dont let my car warm up it does what your describing. It usually happens for a few miles of driving until the engine and trans is warmed up. If your car is doing thing all the time maybe letting it warm up wont help, but just a thought

Agent_4573 · 12-05-2002, 08:20 PM

well we just got about 10 inches of snow today but it seems to do it all the time, even after its warmed up.

drtbiker · 12-06-2002, 10:44 AM

do you have a off road h-pipe??? When ihad my 2.5in offroad h-pipe when my motor mounts were going the h-pipe would hit the floor right where it starts bending up

later

Agent_4573 · 12-06-2002, 05:22 PM

i do have a 2.5 inch h-pipe... how do i check the the motor mounts to make sure there not goign bad?

drtbiker · 12-07-2002, 12:49 AM

well first u can kinda just look at them and see if the rubber looks cracked but u can also try lifting the motor like superman i guess and see if you can move the motor up and there is a gap inbetween the metal and the rubber

later

that same thud drove me krazy in my car for like 3months and then i was very angry when i found out it was somthing that simple

12-05-2002, 06:58 PM	#1
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	Loud thud when i shift Ok so ive got an 89 lx w/ a 5 speed. Everytime i shift and the rpms drop more than 2 or 3 hundred, i hear a thud. It kind of sounds like a backfire but its not. I checked the driveshaft bolts and they're tight. So are the tranny mounts. I couldn't see anywhere under the car that looks like its getting hit, but i still hear the sound.... Any ideas? __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-05-2002, 08:06 PM	#2
AntwaanRandleEL Registered Member Join Date: Sep 2002 Location: Naperville, IL, USA Posts: 76	How cold is it where you are? I live in northern Illinois and its cold as hell here. If I dont let my car warm up it does what your describing. It usually happens for a few miles of driving until the engine and trans is warmed up. If your car is doing thing all the time maybe letting it warm up wont help, but just a thought __________________ There will always be someone faster then you.

12-05-2002, 08:20 PM	#3
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	well we just got about 10 inches of snow today but it seems to do it all the time, even after its warmed up. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-06-2002, 10:44 AM	#4
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	do you have a off road h-pipe??? When ihad my 2.5in offroad h-pipe when my motor mounts were going the h-pipe would hit the floor right where it starts bending up later __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

12-06-2002, 05:22 PM	#5
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	i do have a 2.5 inch h-pipe... how do i check the the motor mounts to make sure there not goign bad? __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-07-2002, 12:49 AM	#6
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	well first u can kinda just look at them and see if the rubber looks cracked but u can also try lifting the motor like superman i guess and see if you can move the motor up and there is a gap inbetween the metal and the rubber later that same thud drove me krazy in my car for like 3months and then i was very angry when i found out it was somthing that simple __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

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