several questions j30

[miseryinmotion]

Hey guys

I have several questions with my car, a 1994 j30. MECHANICAL:1 Im having problems with a rattling noise that is sporadic, oftenly heard at idle. It sounds most likely the exhaust.

2 My J30 is nearing 110 000 miles. Allthough it still shifts pretty smoothly (sometimes sticks though), ive found metal shards in the transmission fluid. I hear it is legendary for these car's trannys to go at 100k, so I got a warranty from the OLDSMOBILE dealer i got it from (used) ... would the dealer replace the transmission due to its very poor appearance?

3. the splash gaurd came off from underneath... is this too much of a problem? the airbox still has it's gaurd.

INTERIOR4. I burned the "pillar" (i think thats its name) on the driver side with my cigarette many a time (ya know, the felt part) .. I was looking at infinitiparts.net, and they list something like:

Pillars, Rocker & Floor, Interior Trim, W"Shield Pillar(L) for twenty seven bucks.

Is this what im looking to replace or does that mean something differently?

THANKS!

[VimyJ]

[quote=" miseryinmotion Hey guys

I have several questions with my car, a 1994 j30. MECHANICAL:1 Im having problems with a rattling noise that is sporadic, oftenly heard at idle. It sounds most likely the exhaust. [/quote]Simple prob. Heat shields along the exhaust system. Tighten them up or remove them.

Quote »2 My J30 is nearing 110 000 miles. Allthough it still shifts pretty smoothly (sometimes sticks though), ive found metal shards in the transmission fluid. I hear it is legendary for these car's trannys to go at 100k, so I got a warranty from the OLDSMOBILE dealer i got it from (used) ... would the dealer replace the transmission due to its very poor appearance?[/quote]I have the same mileage on my J. I got a transmission flush to synthetic and a filter change at 70K. A small amount of metal around the magnet should be OK but experienced eye should be able to tell if it's bad or not. I don't like the sound of your transmission getting stuck, though. Maybe if the wear is bad enough you could go out and do some brake stands or something till it wears out. :icesangel Quote »3. the splash gaurd came off from underneath... is this too much of a problem? the airbox still has it's gaurd.[/quote]Do you mean a mud flap or the front "spoiler"?

Quote »INTERIOR4. I burned the "pillar" (i think thats its name) on the driver side with my cigarette many a time (ya know, the felt part) .. I was looking at infinitiparts.net, and they list something like:

Pillars, Rocker & Floor, Interior Trim, W"Shield Pillar(L) for twenty seven bucks.

Is this what im looking to replace or does that mean something differently?[/quote]They sound like the plastic trim parts but I don't know for sure. I wouldn't mind replacing that window liner felt either.

[VimyJ]

BTW, the J30's trannies can fail because it has the same transmission as the 300ZX na but is heavier by 500 lbs. If the tansmission is well maintained (knock wood), they can go a long, long time.

I'd like the add some Lubeguard (sp?) but I can't find any at my local parts places.

[miseryinmotion]

[quote=" VimyJ Do you mean a mud flap or the front "spoiler"? [/quote]

Im dont know much about cars but I think its the mud flap (the big grey one under the alternator) the 'spoiler' still has a gaurd

[VimyJ]

Im dont know much about cars but I think its the mud flap (the big grey one under the alternator) the 'spoiler' still has a gaurd

Oh, that's what you meant. I would try replacing it with a salvaged part. It not only protects the alternator from the road but the cooling system also relies on a specific air flow through the radiator and around the engine. Your engine will probably run hotter without it.

[Eswift]

vimy is right on all counts here, do everything you can for the transmission and squeeze all the life you can out of it.

[Mayhem_J30]

vimy is right on all counts here, do everything you can for the transmission and squeeze all the life you can out of it.

:Werd

[j30t]

i have a question. My transmission shifts pretty hard from 1st to 2nd around 2-3 thousand rpm....does anyone know why this would be? It is fine shifting from all other gears its just the 1st to 2nd that it jumps a bit. Any answers would be appreciated.

[Mayhem_J30]

i have a question. My transmission shifts pretty hard from 1st to 2nd around 2-3 thousand rpm....does anyone know why this would be? It is fine shifting from all other gears its just the 1st to 2nd that it jumps a bit. Any answers would be appreciated.

this is a normal thing with the J30's transmission. I think some have remedied it with a good sythetic ATF in the past. Does the abrubt shift go away after warmup?

[Q451990]

Hard 1->2 shifts seem to be the norm for all Nissan Transmissions (compared to other shifts) - but nothing like a Honda! I notice it more after changing the Q over to the 93 TCU - I think that may be one of the reasons behind 2nd gear start on the old Q's to begin with...

Heath

[gdude45]

i have the same problem with the transmission shifting fairly hard from 1st to 2nd. i've had my 93 J30 for about two months now and the first thing i did was take it in for the full transmission flush and changeover to synthetic oil. transmission guy (very experienced) said the transmission was in exceptional shape, but i still have that hard shift. i'm going to take it back to him in the next couple of weeks to see if this is normal or if it can be fixed.

[VimyJ]

An abrupt shift from first to second seems to be a common thing with J30's. However, I did use it to advantage after I ignorantly played around with the TPS. My volt meter wasn't sensitive enough to get the voltage right so I just kept adjusting it manually until I got the reassuring cold transmission "nudge" between fisrt and second. However, in my experience, this sudden shift disappears almost entirely when the transmission is fully warmed up and that can take up to 20 minutes.

Would adding "Lubegard" help this gear change?

[Q45tech]

The TPS voltage is critical in the closed loop economy cruise setting of the ecu..........it must be adjusted correctly not to try and fix some other problem.

Try a 1/4 to 1/2 bottle of Lubegard Black the highly modfied friction component may help..........easy to get too much and cause 4th gear lockup slipping problems............try 3 ounces for a week then another 3 ounces........too much and you'll have to drain all and start over.

The transmission measures the ATF temp to correct line pressure for changes in viscosity..........stiff shifts are normal till the ATF warms to 176F...........but wear can change the pressure downward throwing the temp vs pressure calibration off.

[j30t]

drove the car today after posting that message about the hard shift and it seems it only does it about two or three times and then goes away after the transmission is warm. Thanks for the response though. What other things are good to do for the enigne besides a transmission flush which i had done about 5000 miles ago.

[Eswift]

PCVs get clogged after a while. Plenum and TB's can usually use some cleaning after 100k miles. should have you timing belt, water pump, etc. replaced right around 100k miles, as well. Fuel hoses are known to go bad, injectors, and fuel damper and fuel pressure regulators, but those are all replaced on a upon-failure basis. If you see any rubber hoses cracking anywhere in your engine compartments, might as well get them replaced before you get a vacuum, fuel, or coolant leak.

[Mayhem_J30]

PCVs get clogged after a while. Plenum and TB's can usually use some cleaning after 100k miles. should have you timing belt, water pump, etc. replaced right around 100k miles, as well. Fuel hoses are known to go bad, injectors, and fuel damper and fuel pressure regulators, but those are all replaced on a upon-failure basis. If you see any rubber hoses cracking anywhere in your engine compartments, might as well get them replaced before you get a vacuum, fuel, or coolant leak.

If you replace those PCVs do a lot while you're at it. The upper plenum has to come off to replace the valves and hoses. then while it's off might as well have the plenum and TB's cleaned and replace any coolant hoses under there. Would also be a good time for spark plugs and the fuel hoses Eswift mentioned.