GTP issues

Hello folks I own a 2003 Pontiac Grand Prix GTP, I 've done a few mods to this car, 3.4 pulley, k/n coldair intake,and u bend delete. Problem 1: I need a good wheel bearing company I replace the same side passenger front every 3 months I also ride 20's but that is only in the summer and the damn light comes on during the time I ride factories. Problem 2: I done waterpumps before but never this type I'm a big dude 6ft1 320 will my arms fit comfortably in this tight spot it's gonna need changed asap, Problem3:what spark plug is recommended the factory is Ac Delcoc platinum I think but I'm told to use autolites which ones and how do I get the back three! Problem 4: this damn transmission, I had this thing replaced 3x's in 1 yr! I partially blame AAMCO cause they are ones who"rebuilt it" DON'T GO TO AAMCO FOR ANYTHING FAIR WARNING. My Question for that is is there any external fluid to help protect it besides the regular Dexron Bull#$%! Once again yalls help is deeply appreciated thank you.

For the hub assay I would get a GM replacement. It is going to be a tight fit with big arms same goes for the back three plugs. You can try using a universal joint on the spark plug socket. That will aid in getting the back 3 spark plugs out. On the spark plugs use NGK iridiums plugs. That is what is recommended. Also for the water pump you will need to loosen the power steering pump due to the fact that there is a water pump screw that is behind the power steering pump pulley.

Since you have the 3.4" SC pulley you can use the Autolite Copper Core Spark plugs. Either the 605 (one range colder) or 104 ( two colder). Thats all I use in my GTP which is moderately modded.

What brand hubs are you using? Also, depending on the year the axle nut torque value varies so that may be a factor.

On the spark plugs use NDK iridiums plugs.

i dont know, since he's running a 3.4 if your going to go with NGK i would recommend the TR55's, or as Bob suggested the Autolite 605's since they are a colder plug

i would also strongly recommend getting your car tuned, or at lease getting a PCM. From your list of mods...you do not have the supporting mods to be running a 3.4. just my :2cents:

Since you have the 3.4" SC pulley you can use the Autolite Copper Core Spark plugs. Either the 605 (one range colder) or 104 ( two colder). Thats all I use in my GTP which is moderately modded.

What brand hubs are you using? Also, depending on the year the axle nut torque value varies so that may be a factor.

I forgot that you have to use a colder plug when using a 3.4" SC pulley. I should be given some demerit points for not remembering to use colder plugs.

The following NGK spark plugs match the stock heat range.

TR55
G-Power TR55GP
Laser Platinum PTR4B-15
OE Laser Iridium ITR4A15
Iridium IX TR55IX

AC Delco and NGK do have colder range Iridium plugs you can use. However, best to run a check for knock retard (KR) first before swapping out plugs.

Hey gradprix00 what is a pcm

Hey gradprix00 what is a pcm

see link for an example

https://www.zzperformance.com/grand_prix/products1.php?id=182&catid=107