94 Olds Bravada Transmission, No 2nd or 4th


ume642
03-11-2008, 11:43 AM
94 Olds Bravada AWD with transmission problem. Shifts from 1st to third(No 2nd gear or overdrive). Reverse still working fine. When parked, engagement time from nuetral to reverse is approx. 1 second. Engagement time from nuetral to Drive is approx. 3 seconds and shifts hard. Fluid level is fine. No engine codes found. Is this a sure sign of a complete transmission rebuild? or possibly just a small transmission part replacement? Thanks for your thoughts.

ume642

The Bravada has 161,700 miles. At 111,300 it was serviced with new filter and 20 quart flushed then added Amsoil ATF full synthetic. Tested a sample of the ATF with Oil Analysers in April, 2007 at 153,900 miles. The sample tested OK to continue use untill next scheduled service. It doesn't smell any different than it did at that time. I have not droped the pan.

ume642

MT-2500
03-11-2008, 12:29 PM
Can go either way.
How many miles on it?
Ever been serviced?
Have you pulled the transmission pan and looked in there?

IT Needs to be put on a transmission capable scanner and transmission codes checked and transmission shifting data checked out..
Post back any codes?

Headnsouth
03-11-2008, 12:52 PM
Pull the dipstick and smell it. Does it smell burnt? You might get lucky with a fluid/filter change and a bottle of Auto-rx.

ume642
03-11-2008, 01:11 PM
The Bravada has 161,700 miles. At 111,300 it was serviced with new filter and 20 quart flushed then added Amsoil ATF full synthetic. Tested a sample of the ATF with Oil Analysers in April, 2007 at 153,900 miles. The sample tested OK to continue use untill next scheduled service. It doesn't smell any different than it did at that time. I have not droped the pan.

ume642

MT-2500
03-11-2008, 03:12 PM
Get it on a good transmission capable scanner and see what it says.
Post back any codes.
MT

83cutlass
03-11-2008, 08:45 PM
No 2nd or 4th means the 2-4 band or servo or related componets aren't working. Its probablly time for a rebuild.

Chris Stewart
03-12-2008, 12:47 PM
That's the 4l60E trans...computer controlled shifting and likely a shift solenoid(s) issue. Try shifting manually to get a better picture of what's happening.
Like MT-2500 says, getting it scanned with a transmission capable scan tool, used in regular repair shops, is the next move.

ume642
04-13-2008, 09:14 PM
I recently had the transmission checked over at a local shop to check for failure codes. The technician told me that no transmission codes showed up. He also test drove it with the scanner on with no codes showing even while no shifting into 2nd or forth. His recomendations/options or evaluation were as follows: 1. Don't do anything, and it could go 5 miles or more than another 5,000 miles before totaly quitting. 2. There may be a band worn thin and the selenoids pin to engage it is now too short to reach the band to engage it. Try a $350 fix to change the pin to a slightly longer one. However, if there is no spring back when pushing on the new pin, then the opposite side of the band's fixed bolt has broken and this fix is useless and a waste of the $350. However if the band is just worn to thin to engage and the extra pin length will allow it to engage, then problem fixed on an old truck for a lot less than a rebuild. 3. If during number 2 option it is discovered the fixed bolt is broken, then continue to remove Transmission and either rebuild it at $1,800 total with 2year/24,000mile warrenty or replace with remanufactured at $1,672 parts + $550 labor = $2,222Total with 3year/unlimited mileage warrenty. the truck is in decent shape but is probably only worth $2,000 if it's running with all gears.

83cutlass
04-13-2008, 11:16 PM
I don't know why I didn't think of this earlier but is reverse not working?
If not then there is a GM service bulletin for no reverse, second or forth and the problem is a stripped or broken sun shell.
#00-07-30-022C: No Reverse, Second Gear or Fourth Gear (Replace Reaction Sun Shell with More Robust Heat Treated Parts) - (Dec 10, 2004)

http://www.automotiveforums.com/image_en_us/gif/000/999/999/999999995.gif Subject: No Reverse, Second Gear or Fourth Gear (Replace Reaction Sun Shell with More Robust Heat Treated Parts)

Models: 1993-2005 Cars and Light Duty Trucks

2003-2005 HUMMER H2

with 4L60/65-E Automatic Transmission (RPOs M30 or M32)



Condition

(http://www.automotiveforums.com/vbulletin/#ss1-1577111) Some customers may comment on a no reverse, no second or no fourth gear condition. First and third gears will operate properly.
Cause

(http://www.automotiveforums.com/vbulletin/#ss2-1577111) The reaction sun gear (673) may not hold inside the reaction sun shell (670).






The whole solenoid pin idea is completely ridiculous. Don't do that!!

Chris Stewart
04-13-2008, 11:20 PM
I'd go with the rebuild, if it'll last 24 months, it'll go for years and years.
Anybody know of any parts that might need updating? I remember reading about a "shell" part.

Well, 83Cutlass just answered it...cooool.

blazes9395
04-15-2008, 10:56 PM
The sunshell is a common problem withthe 4L60(E)s. Usually,(99.9 %) of the time, if the shell is gone, it will not go into reverse. You'll also get a humming noise in park too. If no codes are coming up, then the best way to get an idea on whats wrong is to put a pressure guage in the tranny. The port is located on the driver side(if I am not mistaken), its just a bolt. It sounds like you lost pressure somewhere and may not be engaging properly.

Also for reference, the updated sunshell is the only way to go. This is called "the beast". It will eliminate the sunshell problem.

As for a longer pin? Thats the best one I have heard. I hope you don't go for that idea. This will guarentee a problem and will leave you with no option but for a rebuild. What a perfect way to make business....

Get a pressure guage on there and this will help you narrow it down for you.

ume642
04-17-2008, 07:52 PM
Reverse is working fine. No humming in park.

A full 2 seconds before it will engage into first gear/drive, and it goes into gear with a minor slam(Need to have the brake on or the car might lurch forward 6 inches when it does engage). This is at idle engine speed.

Only a minor(less than 1 second) delay before engaging into reverse with normal/barely noticable engagement.

ume642

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