Bonneville convertable64

The 1964 full-size oil pressure sending unit, stamped 60 lbs., is GM Part # 1506191 or 6460468. It has both the P/N and 60 lbs. stamped on them. Pricing on these original '64 "AC" units also in the $100 plus range for each. Although the 1963 through 1966 full-size oil pressure sending units may look identical to other AC units, they are internally different. From an old GM "Electrical" handbook, I found out the following: All 1963 through 1966 "Full Size" sending units had a maximum resistance of 31 ohms at full pressure (80 or 60 pounds - the gauges' dial resistances are different allowing for a 80 lbs gauge in the 1963 pod and a 60 lbs gauge in the 1964 pod and so on). This is different from a 1965 through 1966 "GTO" and 1967 and Up all Pontiac models sending unit as they had a maximum resistance of 93 ohms (All the pontiac catalogs including PY and AMES sell these.) One can not use a current GM replacement or aftermarket 1967 and UP 80 pound unit for the 1963 through 1966 "Full-size" Pontiacs as the oil pressure gauge will peg (based upon the resistance of the gauge) at only 20 or 26 pounds of actual oil pressure.

The article you sent me said it takes 60# 30ohm sender. No one seems to have the 60# but the 80# 30ohm will work to a degree. You would need to calculate the difference when viewing the gauge.

Rockauto

The turn signal switch on the steering column was bad. It diverts power so if it doesn’t work correctly the brake lights won’t work. It took me a while to figure out why the brake lights were intermittent. The replacement is only available for tilt wheel. All you have to do is transfer the black switch mechanism over to original bracket. Two bendable metal tabs make for an easy swap. All good now. After inspecting the old one I believe it could have been cleaned and repaired in a pinch. Happy to have a new one now.

Just visited my engine builder. I had to drop off valve covers before rebuilt engine gets paint. It looks great. He said he had to tap the rocker studs which then calls for different rockers. It should be ready for pickup tomorrow!

Good idea. I actually have one but its not as nice as the non ac cluster.

Photo of the transmission and motor just purchased. It is still mounted to the transmission. I suggested that so no damage could occur or parts lost. It looks to be an aluminum trans case. Gene, transmission expert, said they are rare. This makes my 4th one.

What an incredibly helpful batch of information! Thank you so much! We are well on our way to discovering the mysteries of the ‘64 Bonneville. This will need to go into my future book “The travels of 1964 Bonneville”. When the car is solid enough, my son and I plan to travel 3,000 miles back to California where we first bought her. We will have it shipped back since one way is daring enough. After that we will have plenty to fill the pages. Of course your going in the book my friend!

Not sure. It could be a good problem to have meaning the gauges work in the first place. I will need to think about it.

I noticed in the brochure for upgrades the oil pressure and temp gauge was an option. I was able to find them on ebay. I’m looking forward to installing them. Does anyone know if there is a special sending unit for them or do they use the same one that trips the warning light?

The light purchased on eBay came in today. It looks great.

Of course you could lay in the trunk to see if it goes out. Just don’t fall asleep 💤

This type has a Mercury switch to turn on in the vertical(open( position. Maybe your switch went bad?

Happy to find an original trunk light on eBay. They unwind 17’ to use changing a tire. Surprisingly there where a lot to choose from.

You know your enjoying your car when it makes it on the Christmas card.

The ultimate Christmas present!

The super hydromatic and Jetaway are the same transmission.

Take it easy on yourself buddy. We are all learning together

All three Bonneville 389’s I have had the same two timing marks. It has 0 and the 6*. It says that in the service manual somewhere

That’s cool. Take a ton of pictures

My Original motor has been torn down. Rings looked decent for a 64 motor with 100k. It looks like it was never touched. We did a .30 piston bore. Other bearings will stay original. Should be done in a few weeks. 3k for parts and labor from a great local machinists.

Yep, I spent many hours talking to him on the phone just for fun. I would ask around for someone to rebuild yours. Maybe someone has the tools. He can exaggerate a little about the complexity.

The hydra matic and the jetaway 315 are the same. Make sure your pan looks like the picture I added to be sure.

Bought this cool little, original dealer promo car. It Wes 65 but just saw one sell for over 400.00. I guess they didn’t make very many. I need to cut the top off and paint it my color. Nice addition at the car shows.

Picked up some original SS wipers on eBay for Bonnie #2. Just cut some new wiper replacements to fit. Works great in original fashion now.