Hola chicos, tengo una pregunta para vosotros que se**** que sabéis mejor que yo: Este verano cambie el motor 265 en mi 56 Bel Air por un 305,al principio mantuve la caja Powerglide durante unos dias,pero por mala limpieza del radiador se calento el aceite y estropeo la caja aunque hasta entonces funcionaba bien y el coche corria. Finalmente decidi sus***uirla por un th350,hice las adaptaciones necesarias y actualmente es la que llevo,pero desde que monte esta caja el coche tiene otro desarrollo, y voy solo 90 km/h a 4000rpm ,por lo que no puedo mantener buen ritmo y el consumo es muy elevado,antea de instalar la th350 estuve informndome y el desarrollo final es de 1:1 igual que la powerglide,entonces que es lo que pasa? El diferencial es el mismo que llevaba antes,la caja es una 350 BOP y yo noto entrar las 3 velocidades,podria ser que la tercera velocidad fuese de desarrollo mas corto? No entiendo nada!!!
Translation: Hello guys, I have a question for you that I am sure you know better than me: This summer I changed the 265 engine in my 56 Bel Air for a 305, at first I kept the Powerglide box for a few days, but due to poor cleaning of the radiator the oil heated up and damaged the box although until then it worked well and the car ran. Finally I decided to replace it with a th350, I made the necessary adaptations and currently it is the one I have, but since I mount this box the car has another development, and I go only 90 km/h at 4000rpm, so I can not maintain a good pace and the consumption is very high, before installing the th350 I was informing myself and the final development is 1:1 the same as the powerglide, So what happens? The differential is the same as before, the gearbox is a 350 BOP and I notice the 3 speeds entering, could it be that the third gear was shorter development? I don't understand anything!!
Here you go: Hello guys, I have a question for you that I am sure you know better than me: This summer I changed the 265 engine in my 56 Bel Air for a 305, at first I kept the Powerglide box for a few days, but due to poor cleaning of the radiator the oil heated up and damaged the box although until then it worked well and the car ran. Finally I decided to replace it with a th350, I made the necessary adaptations and currently it is the one I have, but since I mount this box the car has another development, and I go only 90 km/h at 4000rpm, so I can not maintain a good pace and the consumption is very high, before installing the th350 I was informing myself and the final development is 1:1 the same as the powerglide, So what happens? The differential is the same as before, the gearbox is a 350 BOP and I notice the 3 speeds entering, could it be that the third gear was shorter development? I don't understand anything!! www.ironandsteele.com
¿Estás se**** de que la transmisión está cambiando a tercera? Si el engranaje del regulador está roto, se quedará en segunda y el motor girará a esa velocidad.
In your case, the only way the rpm could be different is if the trans is not shifting into 3rd, or it is slipping badly. Final drive in the TH-350 is the same as the Powerglide, it is 1:1. Math shows if 90kmh/55 mph is 4000 rpm but the TH-350 is stuck in second gear.....3rd gear would be 2600 rpm. Is roughly 2500-2600 rpm your former cruise rpm with the Powerglide @ 90/kmh??
En tu caso, la única diferencia en las rpm es si la transmisión no cambia a 3.ª o si patina mucho. La transmisión final del TH-350 es la misma que la del Powerglide: 1:1. Los cálculos indican que si 90 km/h (55 mph) son 4000 rpm, pero el TH-350 está atascado en segunda, la 3.ª sería 2600 rpm. ¿Son aproximadamente 2500-2600 rpm las rpm de crucero que tenías con el Powerglide a 90 km/h?
Do not under stand but a few words & som of what Squirrel said Stuck in gear , not shifting ? how about striped driven gear on governor ?
Either it isn't shifting into high gear or the direct clutch is slipping. Years ago when I worked at a Lincoln/Mercury dealership. I had a customer with a 57 Lincoln. He made trips between Springfield and Chicago (about 200 miles one way). He came in and told me that his fuel mileage had really slipped but the car had more power than it ever had. What I found is that the line came off the vacuum modulator. That meant it would only shift at maximum road speed. It took about 75 mph to get into high so he made the trip in second gear. His tail pipes were white as snow.
Nice, but 57 Lincolns came with TurboDrive, which is a heavy duty Furdomatic that doesn't have a vacuum modulator. TV pressure is mechanical via throttle linkage. Perhaps he had a later Twin Turbo Drive, which has vacuum modulator.
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