Restore front suspension 1995 Itasca 1995 Sunrise 28'

[coltronicola]

Hi everyone, i am doing a restoration of the front suspension of my RV but i have a big problem, i bought on rockauto.com the ball joint kit according to my chassis which is a 1995 P30 Chevy 1995 with drum brake, i ordered these ball joint, but i realized they are wrong:


MOVETEC MK6511 MOVOTEC MK6174


I checked and my suspensions are not like those of the P30 but they are like those in the picture!
Who knows how suspensions are? And the Ball Joint Codes?

Thanks in advance...

[DaveVA78Chieftain]

6511 is lower ball joint for Front/rear disk (14,000lb chassis) with 19.5" wheels
6129 is lower ball joint for Front disk / Rear Drum with 16" wheels

6174 is upper ball joint for Front/rear disk with 19.5" wheels
6122 is upper ball joint for Front disk / Rear Drum with 16" wheels

http://www.fme-cat.com/Application.aspx?year=1995&make=CHEVROLET&model=P30&cat=Suspension&subcat=Control%20Arms,%20Ball%20Joints,%20Bushings,%20Misc.&ga=Y&back=true

[coltronicola]

Hi Dave, are you sure?, because my P30 have a heavyduty suspension, in The diagram of moog there aren't the heavy duty suspension, the heavy duty suspension is in the photo of my first post...
thankyou

[DaveVA78Chieftain]

For 1995 Sunrise:
1) The 23RC and 27RQ had 12,300lb chassis
2) The 28RC, 29RQ, 31RQ, 32RQ, and 33RQ either had a 14,800lb or 16,000lb chassis.
What model do you have?

Is the F44 heavy duty chassis option listed on your GM RPO sticker?
Does the GM RPO sticker list the JB8 or JF9 brake option?

[DaveVA78Chieftain]

From my research this is the best info I can provide you: http://dave78chieftain.com/P30Suspension.html

[coltronicola]

hi Dave, than you
My chassis is in the photo, i think i have a f44 suspension (heavy-duty)

[coltronicola]

this is the vin code

[DaveVA78Chieftain]

Please be advised that decoding that VIN says you havea 1994 chassis.  That can affect part identification.

I see you have 19.5" wheels wit 4 wheel disk brakes

Mill Supply

This maybe the Lower Ball Joint

[Rickf1985]

Where do you see 19.5 wheels? The data plate shows 16's.

[DaveVA78Chieftain]

OK, I give up.   D:oH! There seems to be several possibilities for what to ID this configuration.  I am sure the parts he needs are out there but the descriptions are all over the place.  GM drawings point to 4 wheel disk brakes with 19.5" wheels but obviously it is 16" wheels.  Take old to parts counter and match um up

[M & J]

Dave gave up?!?!?!? The world is surely coming to an end...

[coltronicola]

Hi everybody, this is the option list, but i don't see the heavy duty suspension... i don't now, i can't order if i don't sure because i live in Italy and shipment it's very expensive, just i wrong the first time!!!

[DaveVA78Chieftain]

Given your in Italy, have a 12hr time difference, and do not have access to the resources we have here in the states I will do my best to help you.
First, the Regular Production Option (RPO) code sticker will be either in the glove compartment or attached to a closet wall like the GVWR sticker was.

It looks similar to this:


Each 3 digit number is an RPO code (F44, JB8, JB9, etc)

If you have the F44 Heavy duty chassis option, then the F44 code will be listed on that sticker.
With 16" wheels and a GVW of 12,300 I also suspect you will have a JB8 (front disk/Rear Drum brakes) code listed also however it may be JF9 (4 wheel disk brakes).  Many P30 suspension parts rely on the brake configuration to id the correct parts.  Typically, the 16" wheels used the front disk / rear drum (JB8) configuration and the 19.5" wheels used the 4 wheel disk brake option (JF9).

Duh  D:oH!   I just noticed the option codes are printed at the bottom of that page.  No F44 and you have JB8 brakes.

Now, since you have the lower Control Arm removed and already have pushed the ball joint out , the first thing you want to do is measure the diameter of the ball joint hole using a caliper.


This will help us track down which ball joint you need via a process of elimination.  You already said the K6511 (2.29" diameter) is incorrect. so it is either the K6117T (1.97") or the K6129T (?; I have not found the spec yet).  In other words, a process of elimination.

However, based on 16" rims and a 12,300lb GVWR my bet is the K6129T

For the upper, if the K6174 (4 wheel disk brakes) is incorrect, that only leaves the K6522 (front disk, rear drum brakes)

Now that I know no F44 and you have JB8 brakes, according to the MOOG website, a 1994 P30 7.4L front disk/rear drum brakes configuration:
Upper Ball Joint: K6122
Lower Ball Joint: K6129T

As you can see, you have to assembly the clues based on what you can derive from what you have.

Additionally, you can use EBAY for lots of alternative information.

Dorman

Hope all this makes sense - Dave

1995 Itasca Sunrise Brochure
1995 Itasca Sunrise Operators manual
1995 Itasca Sunrise ICF27RQ Parts book
1995 Itasca Sunrise ICF27RQ Plumbing Diagarm
1995 Itasca Sunrise ICF27RQ Wiring Diagarm

[EldoradoBill]

RPO codes are on the sheet in the photo...F66 suspension code and JB8 brake code.

[coltronicola]

Hi everybody, I have checked the diameter of the Ball Joint, and 2.28 inch, I do not understand, obviously the ones that are fine are the 6129T, tomorrow I will buy them from Rockauto, we hope well ....

[DaveVA78Chieftain]

Moog K6129T crosses to TRW 10258 which is 58.6mm (2.3").  That is real close to 2.28"

While this was for 4 wheel disk brakes, the only other info I found is below.  It address things like making sure you have the correct taper so it fits properly in the spindle.

LOWER A-ARMS - 96LY30 - 4 WHEEL DISKS
Nobody makes a lower arm for the chassis with 4 wheel disks. I purchased a pair for the drum rear brakes model (MOOG RK620036/RK620037 - $150 ea). Confirmed with Supersteer that their disk brake model control arms would swap in - they did #SS17210/17211 - $225 ea). The ball joints however are way too small of taper for the spindle. I have requested correct (disk brake) lower ball joints from MOOG, Precision Parts (O'Reilly's), Parts Plus, and Mevotech. Everybody's number crosses over to MOOG numbers. The following MOOG #'s WILL NOT FIT: K6511, K6129T, K6175T, K6117T, K6117.
Finally went back to the source - AC Delco. Their site provided a number of 45D2055. Our local NAPA crossed that number to a NCP 260-1200. This part has the correct taper (O.95" at the top, 1.13" at the bottom) and the correct press-in size (2.2"). Will find out tomorrow if it fits. These ball joints have been the biggest PITA I have ever dealt with for finding parts that fit.

Good luck

[coltronicola]

Hi every body, at the end I bought 6122 for the top and 6129T for the bottom, the taper of the ball joint smaller: 1.15 inch / 1.22 inch, the diameter of the hole on the arm should be 2.30 inches.Thanks to all those who gave me a hand !!!A salute from Italy