Difficulty engageing third gear 61 Ponton. - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 08-20-2010, 04:37 AM Thread Starter
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Vehicle: 1961 mercedes 190b
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Difficulty engageing third gear 61 Ponton.

Hi all, this is my first post and I am seeking advice. I have a 1961 190b Ponton saloon. The car is totally original and has only one problem that irks me a little. This concerns the column change gear selector. When shifting up from second to third the selection quite often gets lost and seems to miss the gate. It is fine shifting down to third from fourth. It seems as though the spring tension is insufficient to drive the gear column down the gate into third. The car has 70,000 miles from new. I had a '56 180 for many years and remember that gear selction was silky smooth and very positive. I have inspected the exterrnal linkage but can see nothing obvious. The synchromesh is perfect
Has anybody any experience of this situation please? Ron,
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post #2 of 6 (permalink) Old 08-20-2010, 01:53 PM
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Take it to a tranny shop. Sounds like your bushings are going bad. Cheap replacement actually ...

You sure the miles are original?
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post #3 of 6 (permalink) Old 08-20-2010, 02:02 PM Thread Starter
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Yes mileage is correct. Which bushings are you referring to? all external linkages seem ok, thanks for your response, p.s. really can't afford to take it to a tranny shop. Ron.
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post #4 of 6 (permalink) Old 08-20-2010, 05:43 PM
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You need to get under the car and check the large flat rubber bushings on the shift arms on top of the trans. Work forwards along the shift rods to the ball joints. I am more familiar with Fintails than Pontons but they are similar. There is a large group of people worldwide that use a Yahoo group.

Here is a link to the Ponton web site.

Mercedes-Benz Ponton Workshop © www.mbzponton.org

IPOG

ponton : International Ponton Owners Group (IPOG)

and make sure the trans has enough ATF and the seals are good.

Main page:

Mercedes-Benz Ponton Mailing Lists / Clubs / Forums / Bulletin Board © www.mbzponton.org

Near Manassas Va. '65 220S, 2006 Ford Crown Victoria Police Interceptor, '99 Volvo V70, '72 350SL 4 speed

Not part of the in-crowd since 1952. It's BRAKES not breaks. You break a bone, use brakes to stop your car. /rant

http://www.megamanual.com/index.html
http://www.bgsoflex.com/megasquirt.html
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post #5 of 6 (permalink) Old 08-20-2010, 07:13 PM
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it's impossible to see Ponton shift bushings from under the car. You actually have to undo the clutch linkage ,the rear engine mounts and lower the trans down far enough to reach them.
They are rubber with a brass sleeve. After 80,000 miles and 50 years the rubbers will have dissapeared. The new ones are nylon and must be pressed into the arms. This of course means that the arms must come off the trans . In this case,undo the drive shaft from the flex disc (which may need replacing) and shove the shaft towards the rear .
On my 220a some clown cut a hole in the floor to reach the bushes...
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post #6 of 6 (permalink) Old 08-21-2010, 12:15 AM Thread Starter
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Thanks to all, seems like a bigger job than I thought, Ron.
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